ceph-common: always include release.yml

Prior to this change, a playbook run with '--tags' or '--skip-tags'
would fail, because the ceph-common role would not include the
release.yml task, and this file defines critical things like
ceph_release.

Thanks Andrew Schoen <aschoen@redhat.com> for help with the fix.

(cherry picked from commit 63e5b5c406)

roles/ceph-common/tasks/main.yml

@@ -4,6 +4,8 @@
 
 # Set ceph_release
 - include: ./release.yml
+  tags:
+    - always
 
 - include: ./checks/check_firewall.yml
   when: check_firewall