Add additional support for --or-show

Add --or-show for the following:
  * v2 roles
  * v2 projects

Change-Id: Ibbae19cda668575b9527fbd259f1298c48b8265b
Add arg to 'server image create' tests

The 'protected' column was not being checked.  Also add it to
image.fakes.IMAGE.

Change-Id: Ie431e9871a7da78b5a3924bfbc51d5575d994d86
Add environment variable in the os-auth-type help

Help for option --os-auth-type doesn't specify what environment variable
configures it. This patch fixes that.

Change-Id: Id2e29e477d5ca56339bd777fb73b5af13788615b
Merge "Add additional support for --or-show"
Merge "Add arg to 'server image create' tests"
Merge "Add environment variable in the os-auth-type help"