confcontroller: Some fixes

Change-Id: I8ba4dee8007ba1aee21f0385441404c7e872a5d8
confcontroller: Fix memory leak

Change-Id: If1a6a49d5ee9d30f3ac2171dd755ed69a43f884d
confcontroller: Emit signal when sink element is no longer required

Change-Id: Ib282487c212d27593cddb148b9dd41cec88f4744
confcontroller: Add mp4mux tuning

Allow sending live video whitout faststart

Change-Id: I9eaac8806d44f93d65c6c2a07edd39caa4a21a09
confcontroller: Remove debug message

Change-Id: Ie4862bc6741594fda632ace5e1fd9b1acee34a80