fixes #2931 - API v2 hosts JSON response, add *_name for each *_id
fixes #3768 - API v2 child nodes should not have an object root for each object
fixes #3137 - API v2 - show error if optional nested object does not exist for nested route
fixes #3646 - API v2 change default root name for api json single object response to no root node but make it configurable
fixes #3766 - change NAME_MAP to be a method
Merge branch '3776-name_map_to_method' into 1809-add_IPA_support