Make ansible speak to appropriate puppetmaster

With split puppet master infrastructure ansible needs to be told which
puppetmaster to talk to. Do this by making puppetmaster a required
argument to the puppet ansible playbook.

Since we can't rely on the cert listing while this is happening also add
puppet master specific host list files which can be used to specify
which hosts talk to which puppetmaster via the new ansible playbook
feature.

Change-Id: I412c2bd6cb390d00d1b9d0e4630e75776edabbb9
Merge "Make ansible speak to appropriate puppetmaster"