webrtcendpoint: add test for vp8 sendrecv
webrtcendpoint: add test for vp8 sendrecv

Change-Id: Ibf4e515d54cc6b588a2fcb64d958a648db33537f

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