Changes to Get public, active groups and group types (no ancestry) by org. Roles: admin, member.

added the optional property groups/items/groupType/externalReferenceId to the response with the 200 status

added the optional property error/errorId to the response with the 400 status

added the optional property error/errorId to the response with the 401 status

added the optional property error/errorId to the response with the 403 status

added the optional property error/errorId to the response with the 404 status

added the optional property error/errorId to the response with the 500 status