fixes #15250 - ignore current controller from link_to/hash_for

When link_to generates a link on a page served from a nested controller
(e.g. foreman_example/examples) with a hash of controller/action from
our hash_for_*_path extension, it calls url_for which added the current...

Refs #3809 - Turning on some rubocop cops

fixes #4151 - enable reports STI

Permits subclassing of ReportImporter and Report to import and store
new types of reports associated to hosts.

fixes #10832 - separating lookup keys into puppet and variable

Refs #3809 - Enable cop Style/IfUnlessModifier

Fixes #11012 - Making Puppet menu cosistent

Fixes #10713 - improved backtrace logging

• full trace in 500 page in production shows really the full trace
• Foreman::Logging.exception as an unified entry point for exceptions logging
• the backtrace cleaner doesn't delete the plugins
• the orchestration exceptions gets the backtrace covered by logger...

Fixes #7096 - Adds STI to templates

This commit converts Ptables to be just another type of Template so it
gets the same features as ConfigTemplate. ConfigTemplate was renamed to
ProvisioningTemplate to reflect UI and the name under it's commonly known.

Refs #3809 - Remove nested ternary and nil checking

fixes #9334 - reverse the order of 'hosts/provisioning setup' sub-menu