Cancel code model indexing on project closing and full code model update

Task-Nr: QTCREATORBUG-1151

src/plugins/cpptools/cppmodelmanager.cpp

@@ -1209,7 +1209,6 @@ void CppModelManager::onAboutToUnloadSession()
     if (m_core->progressManager()) {
         m_core->progressManager()->cancelTasks(CppTools::Constants::TASK_INDEX);
     }
-
     do {
         QMutexLocker locker(&mutex);
         m_projects.clear();