Add tests for multiprocess file appender

lib/appenders/multiprocess.js

@@ -20,7 +20,7 @@ var LogServer = function createLogServer(config) {
           // JSON.parse failed, just log the contents probably a naughty.
           actualAppender(createLoggingEvent('ERROR', 'Unable to parse log: ' + logMessage));
         }
-      })
+      });
     });
   });
   server.listen(config.loggerPort || 5000, config.loggerHost || 'localhost');