Make media object inherit from enable_shared_from_this
Make media object inherit from enable_shared_from_this

Change-Id: Ia851ad02106af93eea68f64ef56150cccc633b28

Kurento/kurento-module-creator,TribeMedia/kurento-module-creator,TribeMedia/kurento-module-creator,KurentoLegacy/ktool-rom-processor,Kurento/kurento-module-creator,shelsonjava/kurento-module-creator,shelsonjava/kurento-module-creator,KurentoLegacy/ktool-rom-processor