Set config file to db sync and other manage operation

Currently, the db sync operation does not specify the config dir or
config file.
If there is a config file in the home path, it will use this one,
but not the right one devstack write.

Set config file to these operations.

Change-Id: Id1fbc3d85280c19596f5ebd301c46bcf018fa2f6
Closes-Bug: #1578098
diff --git a/lib/cinder b/lib/cinder
index 607a6f8..daeb94a 100644
--- a/lib/cinder
+++ b/lib/cinder
@@ -415,7 +415,7 @@
         recreate_database cinder
 
         # Migrate cinder database
-        $CINDER_BIN_DIR/cinder-manage db sync
+        $CINDER_BIN_DIR/cinder-manage --config-file $CINDER_CONF db sync
     fi
 
     if is_service_enabled c-vol && [[ -n "$CINDER_ENABLED_BACKENDS" ]]; then