Revert "Use RC repo"

Preparing for Foreman 1.2.0 release.

This reverts commit f56aa4701c61353fb3263e215eb31ef89b6f3d49.

Conflicts:
	manifests/params.pp
Release v1.2.0
Add new dns_managed param

This allow to use the dnsproxy without the need of "dns" module (for
example when we're using some other DNS module, like puppet-bind).
Documentation of parameters
adding proxy registration REST code