Set default repos/puppets for releases

Since Fuel 5.1 repos/puppets paths are sent by Nailgun to Astute.
So we need to set defaults here, and remove them from Astute in
order to make our code more clear and centralized.

Change-Id: I9bc5d7f4a3de76dd09fb8e45f5d50969e8f19138
Closes-Bug: #1342168
Merge "Set default repos/puppets for releases"