Added Trove (Database as a Service).

- Added changes to stackrc for the Trove Repos.
- Added support to devstack for "install", "configure",
  "init", and "run"

implements blueprint:trove-devstack-integration

Change-Id: Ib3f6daad33e629f764a174b80762c808ce8588e2
diff --git a/unstack.sh b/unstack.sh
index 38f795b..05d9fb7 100755
--- a/unstack.sh
+++ b/unstack.sh
@@ -34,6 +34,7 @@
 source $TOP_DIR/lib/swift
 source $TOP_DIR/lib/neutron
 source $TOP_DIR/lib/ironic
+source $TOP_DIR/lib/trove
 
 # Determine what system we are running on.  This provides ``os_VENDOR``,
 # ``os_RELEASE``, ``os_UPDATE``, ``os_PACKAGE``, ``os_CODENAME``
@@ -130,4 +131,8 @@
     cleanup_neutron
 fi
 
+if is_service_enabled trove; then
+    cleanup_trove
+fi
+
 cleanup_tmp