Add --or-show support for v3 identity resources

Add --or-show for the following:
  * v3 roles
  * v3 projects
  * v3 domains
  * v3 users
  * v3 groups

Closes-Bug: #1390389
Change-Id: Id4ef043e5fda6be49a515eb3fe138c813c393ec9
add keystone v3 region object

Co-Authored-By: Steve Martinelli <stevemar@ca.ibm.com>

Change-Id: Ia6f607630dbf507681733c3ab3b9b7c55de30f49
Closes-Bug: #1387932
Merge "Add --or-show support for v3 identity resources"
Merge "add keystone v3 region object"