Separate request data from actor in Event
Separate request data from actor in Event

To clarify the role of actor, the request data that initiates an event has been
separated. The ActorRecord is pared down to just the username. This eliminates
confusion about where event related data should be added.

Signed-off-by: Stephen J Day <63efd86fa22882ae89b6027b22a36e4db1f4214d@docker.com>

thaJeztah/distribution,thaJeztah/distribution