switch: do not mask systemd unit

If we mask it we won't be able to start the OSD container since now the
osd container use the osd ID as a name such as: ceph-osd@0

Fixes the error:  Failed to execute operation: Cannot send after transport endpoint shutdown

Signed-off-by: Sébastien Han <seb@redhat.com>
(cherry picked from commit fe1d09925a)

infrastructure-playbooks/switch-from-non-containerized-to-containerized-ceph-daemons.yml

@@ -225,7 +225,6 @@
         name: "{{ item }}"
         state: stopped
         enabled: no
-        masked: yes
       with_items: "{{ running_osds.stdout_lines | default([])}}"
       when: running_osds != []