Description of problem:

openshift-ansible fails prerequisite check for Ansible version because it uses a string compare instead of strict_checking.

For example, if the requirement is version 5.7 or higher, and you have version 5.10, the check will fail because the string value of 5.10 is less than 5.7.

Version-Release number of the following components:
rpm -q openshift-ansible
openshift-ansible-3.11.22-1.git.1.c4bb7a6.el7.noarch
rpm -q ansible
ansible-2.5.10-1.el7ae.noarch
ansible --version
ansible 2.5.10
  config file = /etc/ansible/ansible.cfg
  configured module search path = [u'/root/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/lib/python2.7/site-packages/ansible
  executable location = /bin/ansible
  python version = 2.7.5 (default, May 31 2018, 09:41:32) [GCC 4.8.5 20150623 (Red Hat 4.8.5-28)]

How reproducible:

Every time

Steps to Reproduce:
1. Install Ansible 5.10
2. Install OpenShift-Ansible 
3. ansible-playbook --user openshift -i /usr/share/ansible/openshift-ansible/playbooks/openstack/inventory.py -i inventory /usr/share/ansible/openshift-ansible/playbooks/openstack/openshift-cluster/prerequisites.yml

Actual results:

FATAL: Current Ansible version (2.5.10) is not supported. Supported versions: 2.5.7 or newer

Expected results:

(works)

Additional info:

To fix: (/usr/share/ansible/openshift-ansible/roles/lib_utils/callback_plugins/aa_version_requirement.py)

diff --git a/roles/lib_utils/callback_plugins/aa_version_requirement.py b/roles/lib_utils/callback_plugins/aa_version_requirement.py
index 175c99f91..fc594df60 100644
--- a/roles/lib_utils/callback_plugins/aa_version_requirement.py
+++ b/roles/lib_utils/callback_plugins/aa_version_requirement.py
@@ -7,6 +7,8 @@ The plugin is named with leading `aa_` to ensure this plugin is loaded
 first (alphanumerically) by Ansible.
 """
 import sys
+from distutils import version
+
 from ansible import __version__
 
 if __version__ < '2.0':
@@ -29,13 +31,13 @@ else:
  
 # Set to minimum required Ansible version
-REQUIRED_VERSION = '2.5.7'
+REQUIRED_VERSION = version.StrictVersion('2.5.7')
 DESCRIPTION = "Supported versions: %s or newer" % REQUIRED_VERSION
 
 def version_requirement(version):
     """Test for minimum required version"""
-    return version >= REQUIRED_VERSION
+    return version.StrictVersion(version) >= REQUIRED_VERSION