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

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

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

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

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

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

fixes #3515 - API handles not found objects with 404

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