Allow jenkins to log into the host as root

The architecture under which beaker is used is that
the jenkins user will run a program that ssh's back
into the host itself. It needs root privs to do this.

If jenkins can already do that, or a different builder
is more appropriate, please let me know.

Change-Id: I5d05edb9d0f3e7a8b32981d7943019bfb5fea04c
Merge "Allow jenkins to log into the host as root"