ipaselfservice: Allow execution of plugin in client host.

Update selfservice README file and add tests for executing plugin with
`ipaapi_context` set to `client`.

A new test playbook can be found at:

    tests/selfservice/test_selfservice_client_context.yml

The new test file can be executed in a FreeIPA client host that is
not a server. In this case, it should be defined in the `ipaclients`
group, in the inventory file.

README-selfservice.md

@@ -138,6 +138,7 @@ Variable | Description | Required
 -------- | ----------- | --------
 `ipaadmin_principal` | The admin principal is a string and defaults to `admin` | no
 `ipaadmin_password` | The admin password is a string and is required if there is no admin ticket available on the node | no
+`ipaapi_context` | The context in which the module will execute. Executing in a server context is preferred. If not provided context will be determined by the execution environment. Valid values are `server` and `client`. | no
 `name` \| `aciname` | The list of selfservice name strings. | yes
 `permission` \| `permissions` |  The permission to grant `read`, `read,write`, `write`]. Default is `write`. | no
 `attribute` \| `attrs` | The attribute list to which the selfservice applies. | no

tests/selfservice/test_selfservice.yml

 ---
 - name: Test selfservice
-  hosts: ipaserver
+  hosts: "{{ ipa_test_host | default('ipaserver') }}"
   become: true
 
   tasks:
@@ -10,6 +10,7 @@
   - name: Ensure selfservice "Users can manage their own name details" is absent
     ipaselfservice:
       ipaadmin_password: SomeADMINpassword
+      ipaapi_context: "{{ ipa_context | default(omit) }}"
       name: "Users can manage their own name details"
       state: absent
 
@@ -20,6 +21,7 @@
   - name: Ensure selfservice "Users can manage their own name details" is present
     ipaselfservice:
       ipaadmin_password: SomeADMINpassword
+      ipaapi_context: "{{ ipa_context | default(omit) }}"
       name: "Users can manage their own name details"
       permission: write
       attribute:
@@ -32,6 +34,7 @@
   - name: Ensure selfservice "Users can manage their own name details" is present again
     ipaselfservice:
       ipaadmin_password: SomeADMINpassword
+      ipaapi_context: "{{ ipa_context | default(omit) }}"
       name: "Users can manage their own name details"
       permission: write
       attribute:
@@ -44,6 +47,7 @@
   - name: Ensure selfservice "Users can manage their own name details" is present with different attribute initials
     ipaselfservice:
       ipaadmin_password: SomeADMINpassword
+      ipaapi_context: "{{ ipa_context | default(omit) }}"
       name: "Users can manage their own name details"
       permission: write
       attribute:
@@ -54,6 +58,7 @@
   - name: Ensure selfservice "Users can manage their own name details" is present with different attribute initials again
     ipaselfservice:
       ipaadmin_password: SomeADMINpassword
+      ipaapi_context: "{{ ipa_context | default(omit) }}"
       name: "Users can manage their own name details"
       permission: write
       attribute:
@@ -64,6 +69,7 @@
   - name: Ensure selfservice "Users can manage their own name details" member attributes givenname, displayname and title are present
     ipaselfservice:
       ipaadmin_password: SomeADMINpassword
+      ipaapi_context: "{{ ipa_context | default(omit) }}"
       name: "Users can manage their own name details"
       attribute:
       - givenname
@@ -76,6 +82,7 @@
   - name: Ensure selfservice "Users can manage their own name details" member attributes givenname, displayname and title are present again
     ipaselfservice:
       ipaadmin_password: SomeADMINpassword
+      ipaapi_context: "{{ ipa_context | default(omit) }}"
       name: "Users can manage their own name details"
       attribute:
       - givenname
@@ -88,6 +95,7 @@
   - name: Ensure selfservice "Users can manage their own name details" member attribute title is absent
     ipaselfservice:
       ipaadmin_password: SomeADMINpassword
+      ipaapi_context: "{{ ipa_context | default(omit) }}"
       name: "Users can manage their own name details"
       attribute:
       - title
@@ -99,6 +107,7 @@
   - name: Ensure selfservice "Users can manage their own name details" member attribute title is absent again
     ipaselfservice:
       ipaadmin_password: SomeADMINpassword
+      ipaapi_context: "{{ ipa_context | default(omit) }}"
       name: "Users can manage their own name details"
       attribute:
       - title
@@ -112,6 +121,7 @@
   - name: Ensure selfservice "Users can manage their own name details" is present with different read,write permission
     ipaselfservice:
       ipaadmin_password: SomeADMINpassword
+      ipaapi_context: "{{ ipa_context | default(omit) }}"
       name: "Users can manage their own name details"
       permission: read,write
     register: result
@@ -120,6 +130,7 @@
   - name: Ensure selfservice "Users can manage their own name details" is present with different read,write permission again
     ipaselfservice:
       ipaadmin_password: SomeADMINpassword
+      ipaapi_context: "{{ ipa_context | default(omit) }}"
       name: "Users can manage their own name details"
       permission: read,write
     register: result
@@ -128,6 +139,7 @@
   - name: Ensure selfservice "Users can manage their own name details" fails with bad permission read,read
     ipaselfservice:
       ipaadmin_password: SomeADMINpassword
+      ipaapi_context: "{{ ipa_context | default(omit) }}"
       name: "Users can manage their own name details"
       permission: read,read
     register: result
@@ -136,6 +148,7 @@
   - name: Ensure selfservice "Users can manage their own name details" fails with bad permission read,write,write
     ipaselfservice:
       ipaadmin_password: SomeADMINpassword
+      ipaapi_context: "{{ ipa_context | default(omit) }}"
       name: "Users can manage their own name details"
       permission: read,write,write
     register: result
@@ -144,6 +157,7 @@
   - name: Ensure selfservice "Users can manage their own name details" fails with bad attribute title,title
     ipaselfservice:
       ipaadmin_password: SomeADMINpassword
+      ipaapi_context: "{{ ipa_context | default(omit) }}"
       name: "Users can manage their own name details"
       attribute:
       - title
@@ -156,5 +170,6 @@
   - name: Ensure selfservice "Users can manage their own name details" is absent
     ipaselfservice:
       ipaadmin_password: SomeADMINpassword
+      ipaapi_context: "{{ ipa_context | default(omit) }}"
       name: "Users can manage their own name details"
       state: absent

tests/selfservice/test_selfservice_client_context.yml

+---
+- name: Test selfservice
+  hosts: ipaclients, ipaserver
+  become: no
+  gather_facts: no
+
+  tasks:
+  - name: Include FreeIPA facts.
+    include_tasks: ../env_freeipa_facts.yml
+
+  # Test will only be executed if host is not a server.
+  - name: Execute with server context in the client.
+    ipaselfservice:
+      ipaadmin_password: SomeADMINpassword
+      ipaapi_context: server
+      name: ThisShouldNotWork
+    register: result
+    failed_when: not (result.failed and result.msg is regex("No module named '*ipaserver'*"))
+    when: ipa_host_is_client
+
+# Import basic module tests, and execute with ipa_context set to 'client'.
+# If ipaclients is set, it will be executed using the client, if not,
+# ipaserver will be used.
+#
+# With this setup, tests can be executed against an IPA client, against
+# an IPA server using "client" context, and ensure that tests are executed
+# in upstream CI.
+
+- name: Test selfservice using client context, in client host.
+  import_playbook: test_selfservice.yml
+  when: groups['ipaclients']
+  vars:
+    ipa_test_host: ipaclients
+
+- name: Test selfservice using client context, in server host.
+  import_playbook: test_selfservice.yml
+  when: groups['ipaclients'] is not defined or not groups['ipaclients']