ceph-mds: enable application pool

We now enable the application type 'cephfs' for each cephfs pools we
create.

Closes: https://bugzilla.redhat.com/show_bug.cgi?id=1590275
Signed-off-by: Sébastien Han <seb@redhat.com>
(cherry picked from commit a629408967)

roles/ceph-mds/tasks/create_mds_filesystems.yml

@@ -20,6 +20,17 @@
   when:
     - check_existing_cephfs.rc != 0
 
+- name: assign application to cephfs pools
+  command: "{{ hostvars[groups[mon_group_name][0]]['docker_exec_cmd'] | default('') }} ceph --cluster {{ cluster }} osd pool application enable {{ item }} {{ cephfs }}"
+  with_items:
+    - "{{ cephfs_data }}"
+    - "{{ cephfs_metadata }}"
+  changed_when: false
+  delegate_to: "{{ groups[mon_group_name][0] }}"
+  when:
+    - check_existing_cephfs.rc != 0
+    - ceph_release_num[ceph_release] >= ceph_release_num['luminous']
+
 - name: allow multimds
   command: "{{ hostvars[groups[mon_group_name][0]]['docker_exec_cmd'] | default('') }} ceph --cluster {{ cluster }} fs set {{ cephfs }} allow_multimds true --yes-i-really-mean-it"
   changed_when: false