stabilize REST tests

tests/auto/restdeviceclasses/testrestdeviceclasses.cpp

@@ -81,6 +81,7 @@ void TestRestDeviceClasses::initTestCase()
     config.port = 3333;
     config.sslEnabled = true;
     GuhCore::instance()->configuration()->setWebServerConfiguration(config);
+    qApp->processEvents();
 }
 
 void TestRestDeviceClasses::getSupportedDevices()

tests/auto/restdevices/testrestdevices.cpp

@@ -90,6 +90,7 @@ void TestRestDevices::initTestCase()
     config.port = 3333;
     config.sslEnabled = true;
     GuhCore::instance()->configuration()->setWebServerConfiguration(config);
+    qApp->processEvents();
 }
 
 void TestRestDevices::getConfiguredDevices()

tests/auto/restlogging/testrestlogging.cpp

@@ -74,6 +74,7 @@ void TestRestLogging::initTestCase()
     config.port = 3333;
     config.sslEnabled = true;
     GuhCore::instance()->configuration()->setWebServerConfiguration(config);
+    qApp->processEvents();
 }
 
 void TestRestLogging::initLogs()

tests/auto/restplugins/testrestplugins.cpp

@@ -74,6 +74,7 @@ void TestRestPlugins::initTestCase()
     config.port = 3333;
     config.sslEnabled = true;
     GuhCore::instance()->configuration()->setWebServerConfiguration(config);
+    qApp->processEvents();
 }
 
 void TestRestPlugins::getPlugins()

tests/auto/restrules/testrestrules.cpp

@@ -95,6 +95,7 @@ void TestRestRules::initTestCase()
     config.port = 3333;
     config.sslEnabled = true;
     GuhCore::instance()->configuration()->setWebServerConfiguration(config);
+    qApp->processEvents();
 }
 
 void TestRestRules::cleanupMockHistory()

tests/auto/restvendors/testrestvendors.cpp

@@ -69,6 +69,7 @@ void TestRestVendors::initTestCase()
     config.port = 3333;
     config.sslEnabled = true;
     GuhCore::instance()->configuration()->setWebServerConfiguration(config);
+    qApp->processEvents();
 }
 
 void TestRestVendors::getVendors()