Use heat-manage to sync heat db.

heat-db-setup has been deprecated and doesn't work when
devstack uses postgres and mysql isn't installed.

This is causing postgres gating to fail for heat.

Change-Id: I84f0a2d40f0033e52c87b6f0c9c7265471134ffe

lib/heat

@@ -158,7 +158,7 @@ function init_heat() {
     # (re)create heat database
     recreate_database heat utf8
 
-    $HEAT_DIR/bin/heat-db-setup $os_PACKAGE -r $DATABASE_PASSWORD
+    $HEAT_DIR/bin/heat-manage db_sync
     create_heat_cache_dir
 }