Remove links from federation related commands in identity v3

We should remove the 'links' portion from the returned object
for the following commands:

* create/show federation protocol
* create/show mapping
* create/show identity provider

Change-Id: I55654cce1f89de8e532f9acd8092257be33efd85
Remove links from oauth consumers

This should be the last of the v3 identity objects that return
a links section upon create or show.

Change-Id: I45a3b43c303bfed73950095bec8860cbea7a559c
Merge "Remove links from federation related commands in identity v3"
Merge "Remove links from oauth consumers"