The hostfile update script is currently being generated on the
deployment host and copied to all other hosts within an environment.
This is resulting in the 127.0.1.1 entry always containing the hostname
of the deployment host.
Instead, generate a temporary file for the script locally which
pre-populates all shared hosts entries and use that as a template for
assigning the 127.0.1.1 entry on each remote host.
Change-Id: Ia5e375772cab76c748cca058ae7d7944e7528020
Closes-Bug: #1657568
a436640aa7