return invalid consumer name as default in context lib

process/Context_lib/process.js

@@ -86,6 +86,8 @@ ContextUtils.getContextConsumer = function(pContextId)
             return "CampaignSteps";
         case ContextUtils.getContextName("PrivatePerson"):
             return "PrivatePersons";
+        default:
+            return "NO_CONSUMER_DEFINED_IN_CONTEXT_LIB_GETCONTEXTCONSUMER";
     }
 }