Add in text for text mode on trusty

This should be fine for other distros and Ubuntu versions since
the kernel command line is a well known loosely-coupled interface.

Trusty changed the way to get text mode consoles (again) and since
we're deploying servers, where graphics is an anti-feature, lets
work around it by default, again.

Also update test_pxe.test__build_pxe_config to work with the new
kernel option.

updates Ipxe and IPA deploy templates too.

Change-Id: Id42bd362477b1e8dbbd5f2a6188cebacc8a0323a
Merge "Add in text for text mode on trusty"