Package foreman-release-scl -> latest

[kotyara85]

If foreman version entirely managed by puppet migration to a newest version will fail is not up to date.
This's related mostly when used with $repo + $version.
Tested with fresh build + updates + upgrades

[sean797]

@Chiccat I think I'd be okay with parameterizing this, leaving the default unchanged. Setting lastest could cause unintended consequences for some users, further the docs currently explicitly say "upgrade or install the SCL release".

[ekohl]

Apologies for the slow response. We prefer defaulting to installed so I submitted #672 which allows changing the package state via hiera. I hope this works for you but otherwise we can expose it on the main class. I'm going to close this but feel free to continue the discussion or open a new PR based on mine.