kmsrecorderendpoint: Do not set caps when a buffer is received
kmsrecorderendpoint: Do not set caps when a buffer is received

Caps are set through a probe set in sinkapp. This probe waits for a caps
event and update the appsrc's caps with the caps contained in this event

Change-Id: I31009a1f41bf494ff4972a3457c58035622c94ad

Kurento/kms-elements,Kurento/kms-elements,Kurento/kms-elements