Update default server value to new puppet master

Now that we've finished moving all puppet agents to get triggered
from the new master, update their configuration to assume the new
server is the default so that we no longer need to override it when
running locally from the command line.

Change-Id: I446341c5115d948bb8dedbe00e23b38b3e78c62f
Merge "Update default server value to new puppet master"