Merge "Don't fail on warnings in docker-cmd"

heat-config-docker-cmd/os-refresh-config/configure.d/50-heat-config-docker-cmd

@@ -40,13 +40,13 @@ def main(argv=sys.argv):
 
     if not os.path.exists(CONF_FILE):
         log.warning('No config file %s' % CONF_FILE)
-        return 1
+        return 0
 
     try:
         configs = json.load(open(CONF_FILE))
     except ValueError as e:
         log.warning('Could not load config json: %s' % e)
-        return 1
+        return 0
 
     cmd_config_ids = [c['id'] for c in configs
                       if c['group'] == 'docker-cmd']