Add FreeIPA version as Ansible facts for testing.

Some attributes are not present in all supported versions of FreeIPA,
and this might cause tests to fail due to unsupported versions.

This patch add the means to test if a test can be executed based on
the target host FreeIPA version.

tests/env_freeipa_facts.yml

@@ -0,0 +1,18 @@
+# This playbook should be included with `include_tasks` as the first task
+# of a test playbook that requires FreeIPA information.
+#
+# Available Facts:
+#
+# ipa_version: The installed FreeIPA version.
+# ipa_api_version: The installed FreeIPA API version.
+#
+---
+- name: Retrieving FreeIPA version.
+  shell:
+    cmd: 'ipa --version | sed -n "s/VERSION: \([^,]*\).*API_VERSION: \([^,]*\).*/\1\\n\2/p"'
+  register: ipa_cmd_version
+
+- name: Set FreeIPA facts.
+  set_fact:
+    ipa_version: "{{ ipa_cmd_version.stdout_lines[0] }}"
+    ipa_api_version: "{{ ipa_cmd_version.stdout_lines[1] }}"