fixes #3256 - include members in usergroup show

(cherry picked from commit af452a6fdf01582f2c904c10b3c84ffcfe3b93f9)

fixes #3267 - API v1 compatibility for /api/hosts

(cherry picked from commit 2508c6b92ee21f5229126a15a4cefcfcaea0829d)

fixes #2810 - more restful API v2 JSON responses in puppetclasses

NOTE: breaking changes to API v2 api/lookup_keys does not exist, replaced by api/smart_variables and api/smart_class_parameters
(cherry picked from commit 21bf889acc5cb898a2f0888153e4aa46abe40cde)

fixes #3052 - reports#show json rabl template to match as_json output that was removed

fixes #2969 - remove all legacy api code in UI controllers, add deprecation response

fixes #2989 - missing fields in host API output (API v1 and v2)

fixes #3046 - add NIC CRUD, power and boot operations API

fixes #2933 - add missing fields to installation media API

fixes #863 - added ldap_filter to LDAP auth sources to filter lookups using RFC 2254 filters

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