Bug 1095006 — Touch the RoomToken when touching the participant.

https://bugzilla.mozilla.org/show_bug.cgi?id=1095006
`roomparticipant.*` keys doesn't store the hawkToken, there are storing the participant object information (displayName, clientMaxSize, expiration)

`roomparticipant_token` is not storing the tokbox session_token but a hmac used to be able to authenticate the user using Basic Auth.