Changelog: https://forge.puppet.com/puppetlabs/apt/changelog#500-2018-07-18

This is to avoid warnings with dependencies.

This has been deprecated since 1.14 and removed in 1.16.

This was used by the discovery image but that has all moved to the
proxy. See foreman_proxy::remote_file for a replacement.

- Remove JSON installation which is no longer needed since Ruby 1.9
- Remove apipie-based providers
- Remove the foreman_hostgroup type since there's no more provider

* Drop use of the 'stable' repository
* Disallow releases/ as part of the repository
* Add foreman-rails repository
* Stop including foreman::params
* Remove anchor pattern
* Move to https

This moves all puppetmaster defaults to its own parameters file.
Parameters that were used in both are duplicated. It also adds Puppet
types to all parameters.

This removes puppet settings from the top level. The puppet_ssldir is
now an internal detail to determine defaults. It is also no longer set
in Foreman since it's only used as a base for determining SSL paths
which we explicitly set. There is a PR open to remove this setting
altogether.

With recent versions of puppetlabs_spec_helper this is done automatically

This drops support for EL6 by only having the URL for the EL6 GPG key.

It also allows setting the package state of foreman-release-scl.

When for whatever reason the ENC doesn't respond we silenty serve a
cached entry. This can lead to hard to debug problems. This adds a
warning on STDERR which tells the user something is wrong.