Add IPA version verification for ipaconfig's maxhostname tests.

The config attributte maxhostname is only available after IPA
version 4.8.0. The tests for this attribute are now protected to
not run if a previous IPA version is found.

tests/config/test_config.yml

@@ -5,6 +5,8 @@
   gather_facts: false
 
   tasks:
+  - include_tasks: ../env_freeipa_facts.yml
+
   # Retrieve current configuration.
   - name: return current values of the global configuration options
     ipaconfig:
@@ -45,15 +47,17 @@
       ipaadmin_password: SomeADMINpassword
       pac_type: ""
 
-  - name: set maxusername to 255
-    ipaconfig:
+  - name: set maxhostname to 255
+    block:
+      - ipaconfig:
           ipaadmin_password: SomeADMINpassword
-      maxusername: 255
+          maxhostname: 255
+    when: ipa_version is version('4.8.0', '>=')
 
-  - name: set maxhostname to 255
+  - name: set maxusername to 45
     ipaconfig:
       ipaadmin_password: SomeADMINpassword
-      maxhostname: 255
+      maxusername: 45
 
   - name: set pwdexpnotify to 0
     ipaconfig:
@@ -186,18 +190,19 @@
     failed_when: result.changed
 
   - name: set maxhostname to 77
-    ipaconfig:
+    block:
+      - ipaconfig:
           ipaadmin_password: SomeADMINpassword
           maxhostname: 77
         register: result
         failed_when: not result.changed
 
-  - name: set maxhostname to 77, again
-    ipaconfig:
+      - ipaconfig:
           ipaadmin_password: SomeADMINpassword
           maxhostname: 77
         register: result
         failed_when: result.changed
+    when: ipa_version is version('4.8.0', '>=')
 
   - name: set pwdexpnotify to 17
     ipaconfig:
@@ -329,7 +334,6 @@
     ipaconfig:
       ipaadmin_password: 'SomeADMINpassword'
       maxusername: '{{previousconfig.config.maxusername | default(omit)}}'
-      maxhostname: '{{previousconfig.config.maxhostname | default(omit)}}'
       homedirectory: '{{previousconfig.config.homedirectory | default(omit)}}'
       defaultshell: '{{previousconfig.config.defaultshell | default(omit)}}'
       defaultgroup: '{{previousconfig.config.defaultgroup | default(omit)}}'
@@ -352,11 +356,17 @@
     register: result
     failed_when: not result.changed
 
+  - name: reset maxhostname
+    block:
+      - ipaconfig:
+          ipaadmin_password: SomeADMINpassword
+          maxhostname: '{{previousconfig.config.maxhostname | default(omit)}}'
+    when: ipa_version is version('4.8.0', '>=')
+
   - name: reset changed fields, again
     ipaconfig:
       ipaadmin_password: 'SomeADMINpassword'
       maxusername: '{{previousconfig.config.maxusername | default(omit)}}'
-      maxhostname: '{{previousconfig.config.maxhostname | default(omit)}}'
       homedirectory: '{{previousconfig.config.homedirectory | default(omit)}}'
       defaultshell: '{{previousconfig.config.defaultshell | default(omit)}}'
       defaultgroup: '{{previousconfig.config.defaultgroup | default(omit)}}'
@@ -379,6 +389,13 @@
     register: result
     failed_when: result.changed
 
+  - name: reset maxhostname
+    block:
+      - ipaconfig:
+          ipaadmin_password: SomeADMINpassword
+          maxhostname: '{{previousconfig.config.maxhostname | default(omit)}}'
+    when: ipa_version is version('4.8.0', '>=')
+
   # cleanup
 
   - name: cleanup test group