correction on result job if not success

scripts/controller

@@ -207,9 +207,10 @@ class ServerRunner(ZephirCommonController):
         else:
             dico['command'] = result['arg']
         if dico['executed']:
-            dico['success'] = result['success']
-            dico['retcode'] = result['retcode']
-            dico['return'] = result['return']
+            if 'success' in result :
+                dico['success'] = result['success']
+                dico['retcode'] = result['retcode']
+                dico['return'] = result['return']
         return dico
 
     @register_wamp('v1.server.exec.list', notification_uri=None, database=True)