fixes #3828 - set language locale for API messages and error responses

(cherry picked from commit 5a864bedb5d9bbbb68788169aa0f0396a312ac16)

fixes #3925 - create apipie param_groups for API v2 to DRY documentation

(cherry picked from commit 2be84f3d773e74b5cc37841284ec216996fd0b51)

fixes #3920 - prevent 500 ScopedSearch errors on the API, raise UI errors correctly

(cherry picked from commit f9bc5a8e5934aac9bd8d5488f84717d33e359501)

fixes #3760 - API v2 define metadata @total for each controller

(cherry picked from commit 6f9438866488180e196ff18e1372cf0773afe7b9)

Conflicts:
foreman.spec

fixes #2231 - hostgroup deletion is restricted to hostgroups without children

(cherry picked from commit 8c68024ac619121312680ee8afc467857155e71d)

Fixes #4022: Make api puppetrun a PUT for REST standards

(cherry picked from commit bc11c17bcc66fbec3a71be920efa4de32d508ecb)

fixes #3515 - API handles not found objects with 404

(cherry picked from commit 46338cd73c542ecc3aa045b45e831434792c710e)

fixes #3099 - Adding parameters to locations and organizations

fixes #2794 - set api_version and app_info in v1 and v2 base_controllers

fixes #3928 - API v2 - update os_default_templates for operating system