admin: grant qchris tin access (through deployers)

Christian needs access to tin to do deployments of EventLogging software
as per the RT ticket, manager approval has been sought and ticks the
box. Grant access through deployers although adding 'eventlogging-roots'
to tin is an option I guess.

Change-Id: Ice7e173dd273587e34c0a74a726e3c12bf28f895
RT: 8914