Fix Creating Ceilometer MongoDB database failed
Fix Creating Ceilometer MongoDB database failed

The check whether 'already' presents in mongodb output
should belong to changed_when.

Change-Id: Ib982a59820d53ccf5439f59df50c1b1938650967
Closes-Bug: #1641113

dardelean/kolla-ansible,dardelean/kolla-ansible,dardelean/kolla-ansible