Remove repeated callbacks g_signal_connect
Remove repeated callbacks g_signal_connect

Change-Id: Ia515373898deb6722574c2becda6dad6cf0de454

ESTOS/kms-core,shelsonjava/kms-core,KurentoLegacy/gst-kurento-plugins,TribeMedia/kms-core,TribeMedia/kms-core,shelsonjava/kms-core,TribeMedia/kms-core,Kurento/kms-core,KurentoLegacy/gst-kurento-plugins,shelsonjava/kms-core,ESTOS/kms-core,Kurento/kms-core,ESTOS/kms-core,ESTOS/kms-core,shelsonjava/kms-core,TribeMedia/kms-core,Kurento/kms-core,KurentoLegacy/gst-kurento-plugins,KurentoLegacy/gst-kurento-plugins,Kurento/kms-core