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

(cherry picked from commit 0ba99bba2c7496fd44822dd5f2e6b4ccda19177b)

fixes #2837 add an interface to add repositories to kickstart

(cherry picked from commit 6b27556aafbd98f3a0f0bb092fbbc49a6bb587e1, minus cleanups)

fixes #2693 - don't cause handle_ca error when no Puppet CA associated with host

(cherry picked from commit f09d61de451450a566c7ee16bdf35281e98708c4)

Fixes #2826: only run set_code() on submit if the config template editor is already in diff mode

(cherry picked from commit ceabd2b37d1924a45ee20de100d0e5cb8f39845d)

fixes #2801 - remove LOWER in default_scope of models that could cause PG error

(cherry picked from commit 60e2072a7751819b1d870681294e3feff3de3cbf)

fixes #2373 - only reference unattended subnet path when in unattended mode

(cherry picked from commit 754e83c1667ab7af677064f468354d325f59c36f)

fixes #2797 - Submit the final code, not the diff in the config template editor
(cherry picked from commit 99b2e61bed1474451fdef1852d484f009dc4cb2f)

fixes #2779 - permission problem with non-admin adding puppetclasses to hosts and hostgroups
(cherry picked from commit 05fbe52cacb64700af76f8f072b2ff5cd16c23cc)

fixes #1770 - Refactored rdeckfacts definition to use facts_hash
(cherry picked from commit 86e9a056e5a1d24b9532674d5f14762a1bd9ab78)

fixes #2791 - ptable api was missing :layout and :os_family
(cherry picked from commit 774ed2d2ac6af23369eafa7658b0a446f3b63adf)