Trove: Set appropriate service URLs

Without setting these, they default to localhost which
works in the the gate, but may not work in all devstack
setups.

Change-Id: I50eadbf0b4975cf04ec945bcf463c2738e6e7a3c
Merge "Trove: Set appropriate service URLs"
Merge branch 'master' of github.com:openstack-dev/devstack