Unconditionalizing a step so that ubuntu;debian output is correct

for glance database configuration.

Cherry-pick from https://review.openstack.org/#/c/53456/

Change-Id: Ie79ae4223da968a67a4c7b497ba57dcc4870b856
Closes-bug:1243925
Merge "Unconditionalizing a step so that ubuntu;debian output is correct" into stable/havana