Fix #1809, use the proper method to fail

lib/ansible/modules/extras/system/firewalld.py

@@ -257,6 +257,8 @@ def main():
         ),
         supports_check_mode=True
     )
+    if module.params['source'] == None and module.params['permanent'] == None:
+        module.fail_json(msg='permanent is a required parameter')
 
     if not HAS_FIREWALLD:
         module.fail_json(msg='firewalld and its python 2 module are required for this module')