Trove doesn't use extras
Trove doesn't use extras

Remove it from the requirements

Change-Id: Ibb47eaf0cf9b3e8a60b258789234b64c4a08db31

fabian4/trove,hplustree/trove,cp16net/trove,fabian4/trove,zhangg/trove,redhat-openstack/trove,hplustree/trove,mmasaki/trove,changsimon/trove,cp16net/trove,zhujzhuo/openstack-trove,openstack/trove,cp16net/trove,fabian4/trove,zhujzhuo/openstack-trove,mmasaki/trove,redhat-openstack/trove,openstack/trove,changsimon/trove,zhujzhuo/openstack-trove,zhangg/trove,changsimon/trove,redhat-openstack/trove,mmasaki/trove