Add missing response examples for keystone OS-OAUTH1 API documentation

[Hemanth Nakkina]

Add response examples to OS-OAUTH1 api documentation for the following API
(https://developer.openstack.org/api-ref/identity/v3-ext/index.html?expanded=#os-oauth1-api)

/v3/users/{user_id}/OS-OAUTH1/access_tokens/{access_token_id}/roles
/v3/users/{user_id}/OS-OAUTH1/access_tokens/{access_token_id}/roles/{role_id}

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/459528

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/459528
Committed: https://git.openstack.org/cgit/openstack/keystone/commit/?id=3ad52286295cf360ead4732664d6ef7bc0b376da
Submitter: Jenkins
Branch: master

commit 3ad52286295cf360ead4732664d6ef7bc0b376da
Author: Hemanth Nakkina <email address hidden>
Date: Tue Apr 25 12:06:03 2017 +0530

    Add response examples to OS-OAUTH1 api documentation

    Add response examples to API documentation for following API
    /v3/users/{user_id}/OS-OAUTH1/access_tokens/{access_token_id}/roles
    /v3/users/{user_id}/OS-OAUTH1/access_tokens/{access_token_id}/roles/{role_id}

    Change-Id: I380348d149fd917d636ef4e0e6589fffdedee2ab
    Closes-Bug: #1686015

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/keystone 12.0.0.0b2 development milestone.