Increase minimal Ansible version to 2.8

ansible-freeipa is a new Ansible Collection introduced with Ansible 2.8 and
Ansible Galaxy 3.2.

README.md

@@ -31,7 +31,7 @@ Requirements
 ------------
 
 **Controller**
-* Ansible version: 2.5+
+* Ansible version: 2.8+ (ansible-freeipa is an Ansible Collection)
 * python3-gssapi is required on the controller if a one time password (OTP) is used with keytab to install the client.
 
 **Node**

requirements.txt

-ansible>=2.5.0
+ansible>=2.8.0

roles/ipaclient/meta/main.yml

@@ -5,7 +5,7 @@ galaxy_info:
   description: A role to join a machine to an IPA domain
   company: Red Hat, Inc
   license: GPLv3
-  min_ansible_version: 2.5.0
+  min_ansible_version: 2.8
   platforms:
   - name: Fedora
     versions:
@@ -13,7 +13,7 @@ galaxy_info:
   - name: EL
     versions:
     - 7
-    # - 8
+    - 8
   galaxy_tags:
     - identity
     - ipa

roles/ipareplica/meta/main.yml

-# dependencies:
-#   - role: t_woerner.ipaclient
+dependencies: []
 
 galaxy_info:
   author: Thomas Woerner
   description: A role to setup an IPA domain replica
   company: Red Hat, Inc
   license: GPLv3
-  min_ansible_version: 2.5
+  min_ansible_version: 2.8
   platforms:
   - name: Fedora
     versions:
@@ -14,7 +13,7 @@ galaxy_info:
   - name: EL
     versions:
     - 7
-    # - 8
+    - 8
   galaxy_tags:
     - identity
     - ipa

roles/ipaserver/meta/main.yml

-# dependencies:
-#   - role: t_woerner.ipaclient
+dependencies: []
 
 galaxy_info:
   author: Thomas Woerner
   description: A role to setup an iPA domain server
   company: Red Hat, Inc
   license: GPLv3
-  min_ansible_version: 2.5
+  min_ansible_version: 2.8
   platforms:
   - name: Fedora
     versions:
@@ -14,7 +13,7 @@ galaxy_info:
   - name: EL
     versions:
     - 7
-    # - 8
+    - 8
   galaxy_tags:
     - identity
     - ipa