tests/auto/buffertest.cpp replace timeStamp test with the two replacements
tests/auto/buffertest.cpp replace timeStamp test with the two replacements

test decodingTimeStamp and presentationTimeStamp

GStreamer/qt-gstreamer,nasserGanjali/QtGStreamer,tswindell/qt-gstreamer,knuesel/qt-gstreamer,iperry/qt-gstreamer,dejunk/gstreamer,nasserGanjali/QtGStreamer,detrout/qt-gstreamer,detrout/qt-gstreamer,knuesel/qt-gstreamer,detrout/qt-gstreamer,dejunk/gstreamer,dejunk/gstreamer,iperry/qt-gstreamer,knuesel/qt-gstreamer,freedesktop-unofficial-mirror/gstreamer__qt-gstreamer,freedesktop-unofficial-mirror/gstreamer__qt-gstreamer,iperry/qt-gstreamer,nasserGanjali/QtGStreamer,tswindell/qt-gstreamer,GStreamer/qt-gstreamer,GStreamer/qt-gstreamer,tswindell/qt-gstreamer,freedesktop-unofficial-mirror/gstreamer__qt-gstreamer