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.h

@@ -42,15 +42,15 @@
 #ifndef CAMERABINIMAGEENCODE_H
 #define CAMERABINIMAGEENCODE_H
 
-class CameraBinSession;
-
 #include <qimageencodercontrol.h>
 
 #include <QtCore/qstringlist.h>
 #include <QtCore/qmap.h>
 
 #include <gst/gst.h>
-QT_USE_NAMESPACE
+QT_BEGIN_NAMESPACE
+
+class CameraBinSession;
 
 class CameraBinImageEncoder : public QImageEncoderControl
 {
@@ -83,4 +83,6 @@ private:
     QMap<QString,QStringList> m_codecOptions;
 };
 
+QT_END_NAMESPACE
+
 #endif