Use identity V3 API for endpoint creation

Always use the keystone V3 API when creating services and endpoints. The syntax
here is slightly different but we maintain the function interface.

Change-Id: Ib3a375918a45fd6e37d873a1a5c0c4b26bdbb5d8
Implements: bp keystonev3
diff --git a/lib/ceilometer b/lib/ceilometer
index 163ed0b..7905384 100644
--- a/lib/ceilometer
+++ b/lib/ceilometer
@@ -130,9 +130,8 @@
         create_service_user "ceilometer" "admin"
 
         if [[ "$KEYSTONE_CATALOG_BACKEND" = 'sql' ]]; then
-            local ceilometer_service=$(get_or_create_service "ceilometer" \
-                "metering" "OpenStack Telemetry Service")
-            get_or_create_endpoint $ceilometer_service \
+            get_or_create_service "ceilometer" "metering" "OpenStack Telemetry Service"
+            get_or_create_endpoint "metering" \
                 "$REGION_NAME" \
                 "$CEILOMETER_SERVICE_PROTOCOL://$CEILOMETER_SERVICE_HOST:$CEILOMETER_SERVICE_PORT/" \
                 "$CEILOMETER_SERVICE_PROTOCOL://$CEILOMETER_SERVICE_HOST:$CEILOMETER_SERVICE_PORT/" \