fixed warning in main.cc

Author: Andrii Boichuk

src/Test/main.cc

@@ -243,7 +243,7 @@ int main(int argc, char *argv[])
 
     int startError = wd_server->Start();
     if (startError){
-        std::cout << "Error while starting server, errorCode " << startError << endl;
+        std::cout << "Error while starting server, errorCode " << startError << std::endl;
         return startError;
     }