refs #605, fixed unit test itself

* threaded reader were normal members causing a crash when those were moved in their own thread
* we need own event processing for unit test
* Network request needs to be generated in main thread
* don`t shutdown readers on QCoreApplication::aboutToQuit, let CApplication handle it
* use CApplication in unit test (as in real world)

Unrelated:
* access global setup via application

tests/blackcore/testnetwork.cpp

@@ -84,6 +84,8 @@ namespace BlackCoreTest
             qDebug() << "DISCONNECTED";
         })
         .wait(10);
+
+        QThread::msleep(250); // make sure the last debug messages are written
     }
 
     bool CTestNetwork::pingServer(const CServer &server)