Add the X-Detect-Content-Type request header

Also, fixed issues with a nested entity
&name; inside another entity (build failed)

Closes-Bug: #1274988

Change-Id: I06d0efeb88287182f0f04574f68039e6294fc40a
author: diane fleming
Remove GET v3/roles/{role_id}/users and add GET v3/role_assignments

Remove non-existent operation (GET v3/roles/{role_id}/users
Add missing GET v3/role_assignments

Closes-Bug: #1284895

Change-Id: Iffbc6325bf9a32a21662a2bad256ed9f55689460
author: diane fleming
Update the subnets WADL for OpenStack Networking

Fixed these issues:
Update subnet's content is for "create subnet"
create subnet's contents is for list subnet
List subnet's contents is for show subnet

Partial-Bug: #1292359

Change-Id: Icd51ef19484a3f8780ffad2c51017b430d715bbd
author: diane fleming
Merge "Remove GET v3/roles/{role_id}/users and add GET v3/role_assignments"
Merge "Add the X-Detect-Content-Type request header"
Merge "Update the subnets WADL for OpenStack Networking"