AutoTest: Add some gtest related settings

This patch enables execution of disabled tests, repetition of
test runs and shuffling of test sets.

Change-Id: I3668afde5766d18acdf1afb7edd913655b13a76c
Reviewed-by: David Schulz <david.schulz@theqtcompany.com>
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@theqtcompany.com>

src/plugins/autotest/testoutputreader.h

@@ -100,6 +100,7 @@ private:
     QString m_currentTestSet;
     QString m_description;
     QByteArray m_unprocessed;
+    int m_iteration = 0;
 };