use the ansible_version variable

use the builtin variable to check the ansible version

Signed-off-by: Sébastien Han <seb@redhat.com>

roles/ceph-common/tasks/checks/check_system.yml

@@ -21,13 +21,9 @@
     ceph_stable_rh_storage and
     {{ ansible_distribution_version | version_compare('7.1', '<') }}
 
-- name: check ansible version
-  local_action: shell ansible --version | awk '/[0-9].[0-9].[0-9]/ {print $2}'
-  changed_when: false
-  become: false
-  register: ansible__version
-
 - name: fail on unsupported ansible version
   fail:
     msg: "Ansible version must be >= 1.9, please update!"
-  when: "{{ ansible__version.stdout | version_compare('1.9', '<') }}"
+  when:
+    ansible_version.major|int == 1 and
+    ansible_version.minor|int < 9