Handle trove service availabilty in tempest.

Partially implements blueprint: trove-tempest
Change-Id: I5413a7afeffe670f6972b41d61dd27ed05da5ba2
diff --git a/lib/tempest b/lib/tempest
index 95b300c..08c0553 100644
--- a/lib/tempest
+++ b/lib/tempest
@@ -329,7 +329,7 @@
     iniset $TEMPEST_CONF network-feature-enabled api_extensions "${NETWORK_API_EXTENSIONS:-all}"
 
     # service_available
-    for service in nova cinder glance neutron swift heat horizon ceilometer ironic savanna; do
+    for service in nova cinder glance neutron swift heat horizon ceilometer ironic savanna trove; do
         if is_service_enabled $service ; then
             iniset $TEMPEST_CONF service_available $service "True"
         else