Foreman » Installer

Refs #5815 - make sure the required users are present

By making sure the packages that deploy users are there

Addresses changes made to katello-certs-tools regarding location of
cert generation and password arguments to katello-certs-tools. Provies
cleanup and simplification of where and what certs are used as well as
changing the naming conventions to reflect the fact that Katello is...

Provides clean up and ordering change of parameters to reduce dependency
on un-created directories.

Remove unused code

Clean code

Get certs work on one place