Pluginmanager: Test if there are tests to run, if so, then quit when done.

Double testing, only enable the codeblock when tests are found to be run,
also, only send the quit message if there are tests found to be run.

src/app/main.cpp

@@ -354,8 +354,11 @@ int main(int argc, char **argv)
     // shutdown plugin manager on the exit
     QObject::connect(&app, SIGNAL(aboutToQuit()), &pluginManager, SLOT(shutdown()));
 
+#ifdef WITH_TESTS
     // Do this after the event loop has started
-    // QTimer::singleShot(100, &pluginManager, SLOT(startTests()));
+    if(pluginManager.runningTests())
+        QTimer::singleShot(100, &pluginManager, SLOT(startTests()));
+#endif
 
     return app.exec();
 }

src/libs/extensionsystem/pluginmanager.cpp

@@ -641,6 +641,8 @@ void PluginManager::startTests()
         }
         QTest::qExec(pluginSpec->plugin(), methods);
     }
+    if(!d->testSpecs.isEmpty())
+        QTimer::singleShot(1, QCoreApplication::instance(), SLOT(quit()));
 #endif
 }