Updated openstack/openstack
Project: openstack/trove  fa989cde328be665d42c7febe1c6e7ea87a81cfc
null
Adding override.config.template for percona

After the 'adding configuration group support' patch was merged,
percona instance-create is failing because the TM cannot find
the override.config.template for percona. Adding this template
fixes the problem.

Change-Id: I63404cfa8cd9bd850e4fc7457a3d4bcc2711685c
Closes-Bug: #1277376