Handle smart proxy and plugins packaged for SCL

[ehelms]

No description provided.

[ehelms]

Repository with all packages for testing -- https://fedorapeople.org/groups/katello/scl-proxy/

[ekohl]

Ideally we'd expose plugin_prefix as a parameter so users can still use the module with older versions. It'd have an upgrade warning, but various users do use the latest releases on older versions. It'd lead to complicated code in the dynflow plugin though.

[evgeni]

I think we'll also have to adjust

puppet-foreman_proxy/manifests/params.pp

Lines 122 to 126 in eb3ad13

	if $::osfamily == 'RedHat' and versioncmp($::operatingsystemmajrelease, '7') <= 0 and fact('ipaddress6') {
	$bind_host = ['::']
	} else {
	$bind_host = ['*']
	}

now that we use Ruby 2.5 and not 2.0 anymore (not strictly required in this PR, but for for overall ProxySCL feature)

[ehelms]

Updates that include changing bind_host, related installer PR theforeman/foreman-installer#447

[evgeni]

LGTM

@ekohl any further comments from your side?

[ekohl]

Looks good from my side. Leaving it open so we can merge it together with the others.