Enable cluster tests for Redis
Enable cluster tests for Redis

Enable clustering tests for the Redis datastore.

Change-Id: I5b894a1934cbc2331256aba49f5817a03f347605

mmasaki/trove,redhat-openstack/trove,redhat-openstack/trove,openstack/trove,redhat-openstack/trove,zhangg/trove,hplustree/trove,mmasaki/trove,zhangg/trove,hplustree/trove,mmasaki/trove,openstack/trove