Adding two classes RequestIdProxy and GeneratorProxy derived from
wrapt.ObjectProxy to wrap objects returned from the API.

GeneratorProxy class is used to wrap generator objects returned
by cases like images.list() etc. whereas RequestIdProxy class is
used to wrap non-generator object cases like images.create() etc.

In all cases the returned object will have the same behavior as
the wrapped(original) object. However now the returned objects
will have an extra property 'request_ids' which is a list of
exactly one request id.

For generator cases the request_ids property will be an empty list
until the underlying generator is invoked at-least once.

Co-Authored-By: Abhishek Kekane <abhishek.kekane@nttdata.com>

Closes-Bug: #1525259
Blueprint: return-request-id-to-caller
Change-Id: If8c0e0843270ff718a37ca2697afeb8da22aa3b1

"ploop" image format is supported in upstream Glance
https://review.openstack.org/341633

And similar patch has been added in python-openstackclient:
https://review.openstack.org/411405

Co-Authored-By: yuyafei <yu.yafei@zte.com.cn>
Change-Id: I1471224df97cf5fecfe7f02e549855af81c45848
Related-Bug: 1650342

vhdx is also a format of the disk valid value in v2 version,
so add it in disk_format.

Related-Bug: 1635518
Co-Authored-By: Stuart McLaren <stuart.mclaren@hpe.com>
Change-Id: I7d82d4a4bdb180a53e86552f6f6b3bed908e6dc0

This patch adds support for community images retrieval and
creation in the Glance client.

Depends-On: I94bc7708b291ce37319539e27b3e88c9a17e1a9f
Change-Id: I81e83eab5a9d30643c354f0cb6df425cf7a7bae3

This reverts commit e77322c17931810f4029ef339a791f702f2f4580.

Change-Id: Ida826a2aa888beeb76dbe657b2ccd6cb088157ed

Docs team changed URL for search engine optimization.

Change-Id: I68e2a5d666da55722d5ee2fa4aec2326c0de0946