Changing filter pattern on setup module call

check-rsyslog validation demonstrated a novel syntax error
caused by form of the "filter" argument of the setup ansible module.

Modification of the argument form was made to align with module requirements.
The validation was added in catalogue tests.

Resolves: rhbz#2116304

Signed-off-by: Jiri Podivin <jpodivin@redhat.com>
Change-Id: I15c56f71da5d7358e0a13d16bcd975d65b36c7b0
(cherry picked from commit 5c34b1c52b)

roles/validations/vars/main.yaml

@@ -77,6 +77,7 @@ validation_catalogue:
     - check-ftype
     - check-network-gateway
     - check-ram
+    - check-rsyslog
     - check-selinux-mode
     - container-status
     - controller-token

validations_common/roles/check_rsyslog/tasks/main.yaml

@@ -1,8 +1,7 @@
 ---
 - name: Gather facts
   setup:
-    filter:
-      - ansible_os_family
+    filter: "ansible_os_family"
 - include_tasks: yum.yaml
   when: (ansible_os_family == 'RedHat') or
         (ansible_os_family == 'CentOS')