Fixes #2501 - Allow my_hosts scope to include all subclasses of Host::Base

Fixes #2867: use the future relative tense for the orchestration process during provisioning

fixes #2766 Setting categories not consistently loaded and shown in dev

fixes #2838 - taxonomies controller - fix in params and finder

added a HTML id to the operating system ui tab

similar to the id we have in the host and hostgroup forms,
this change makes the ui plugin code look clean.

fixes #2851 - refresh puppet classes on environment change

fixes #2788 - adding / removing puppet classes updates the change even if the form is not submitted

fixes #2837 add an interface to add repositories to kickstart, cleanup similar methods

Fixes #2576 - Add optional update of Host.ip from built request

Fixes #2839 - retry SSH authentication issues with cloud-init