Updated the camerabin2 based camera with QtMultimedia changes

Moved it to the separate plugin as the rest of gstreamer based services;
Updated with libqgsttools_p changes;
Implemented QMediaRecorder::status property;
Made gst_photography dependency optional,
it's not always available on desktop;
Added video recording case to auto integration test;
Moved backend implementation into qt namespace

Task-number: QTBUG-26046
Change-Id: Iacfc1a6e263a4c0201d5eb28d04c960b87a230c0
Reviewed-by: Michael Goddard <michael.goddard@nokia.com>

src/plugins/gstreamer/camerabin/camerabinimageencoder.cpp

@@ -44,6 +44,8 @@
 
 #include <QtCore/qdebug.h>
 
+QT_BEGIN_NAMESPACE
+
 CameraBinImageEncoder::CameraBinImageEncoder(CameraBinSession *session)
     :QImageEncoderControl(session), m_session(session)
 {
@@ -85,3 +87,5 @@ void CameraBinImageEncoder::setImageSettings(const QImageEncoderSettings &settin
     m_settings = settings;
     emit settingsChanged();
 }
+
+QT_END_NAMESPACE