galera::client -> openstack::galera::client
galera::client -> openstack::galera::client

handle more API renaming in fuel-library 9.0
caused by commit 041aa989a0a701622f06782197413288bdffb19e in
fuel-library, Feb 16th.

Change-Id: I022c4c3cb78b1a8058d689f7e3ae415f6a4799f3

Tesora/fuel-plugin-tesora-dbaas,Tesora/fuel-plugin-tesora-dbaas