Fix response info for "Image schemas" apis

[Li Yuanyuan]

Wrong response info for /v2/schemas/images and /v2/schemas/image APIs.

http://developer.openstack.org/api-ref-image-v2.html#getImagesSchema
http://developer.openstack.org/api-ref-image-v2.html#getImageSchema

There are two items under "Image schemas" section need to be updated:

1. GET/v2/schemas/images
2. GET/v2/schemas/image

# curl -X GET -H "x-auth-token:$TOKEN" http://controller:9292/v2/images | python -m json.tool
# curl -X GET -H "x-auth-token:$TOKEN" http://controller:9292/v2/image | python -m json.tool

The two command from the real machine, the output response info is different from the doc desc.
The command info see in the attachment file.

[Li Yuanyuan (liyuanyuan)]

Fix proposed to branch: master
Review: https://review.openstack.org/227099

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/227099
Committed: https://git.openstack.org/cgit/openstack/api-site/commit/?id=27b3ddb2a2074a704e3b87b82bd31aaefaa5049b
Submitter: Jenkins
Branch: master

commit 27b3ddb2a2074a704e3b87b82bd31aaefaa5049b
Author: Li Yuanyuan <email address hidden>
Date: Thu Sep 24 19:37:02 2015 +0800

    Fix response info for "Image schemas" apis

    Wrong response info for /v2/schemas/images and /v2/schemas/image APIs.

    Co-Authored-By: Dai Yongjin <email address hidden>

    Change-Id: Ia2b8574b0ef49e870d0848ef15db4b4874e1bf90
    Closes-Bug: #1499153
    Closes-Bug: #1490953