Bug 1095006 — Touch the RoomToken when touching the participant.
@ametaireau nit picks.
@ametaireau review about setRoomToken -> setRoomAccessToken.
Use idHmac instead of 1234 for storage tests.
isValidRoomAccessToken -> isRoomAccessTokenValid
Merge pull request #240 from mozilla-services/1095006-roomparticipant-ttl

Bug 1095006 — Touch the RoomToken when touching the participant.