The federation APIs for the identity providers introduce a new parameter
for every identity provider, named remote_ids, which contains a list of
entity ID associated with. This parameter can be provided during the creation
of the identity provider and can be updated at any time. For more information
look at the blueprint:

https://blueprints.launchpad.net/keystone/+spec/idp-id-registration

This patch add the support to this new parameter in the command line by
inserting the option "--remote-id" in the following commands:

- "identity provider create"
- "identity provider set"

Additionally, the values can be read from a file, specified by
"--remote-id-file", containing an entity id per line.

Change-Id: Ie93340ee57e54128daa70d8a7bd0a9975ff7eef4
Depends-On: I12a262c55b5f6b5cc7007865edf30f14269da537
Implements: blueprint idp-id-registration

try and add some consistency with the show and delete commands.

replace 'show x' with 'display x'
change 'delete a y' with just 'delete y'

Change-Id: I47dfa8ee23ac5c41b355796415eb515155832f65

Change-Id: Ie73accfaa3d45205a2521e6e61efd16142c460b2