Install the user's ssh key near the end

We want to make sure that everything (particularly the RAID
configuration) has been completed before the user can log in.
Add a missing 'fi' at the end
Update local checkout of telemetry-server

Make sure the telemetry-server code is up to date before starting
the job.
Update the AMI to a nice fresh one.
Update self-serve analysis code to version 6

This releases the updated worker AMI (bug 1007167)
Merge pull request #50 from mozilla/telemetry_dash_ami_bug1007167

Telemetry dash ami bug1007167