Fixed return type for export_record and import_record
in volume backups.

TrivialFix

Change-Id: I58aea0996961eab33e5cfa7d57b59cda9859e82e

Added request_ids attribute to resource object for all the
volume_backups, volume_encryption_types and volume_transfers
APIs by updating following APIs:

volume_backups: reset_state, delete, export_record, import_record
volume_transfers: delete
volume_encryption_types: list

Returning list with request_ids as attribute in case of 'list' API
for volume_encryption_types.

These changes are required to return 'request_id' from client to log
request_id mappings of cross projects.

For more details on how request_id will be returned to the caller,
please refer to the approved blueprint [1] discussed with the
cross-project team.
[1] http://specs.openstack.org/openstack/openstack-specs/specs/return-request-id.html

DocImpact
'request-ids' will be returned as an attribute with response object.
User can access it using 'res.request_ids' where 'res' is a
response object.

Change-Id: I2197ca38f6c9a8b0ced5c82d29676b49c9700b09
Partial-Implements: blueprint return-request-id-to-caller

This adds CLI support for backup snapshots.

Server side change is here:
https://review.openstack.org/#/c/243406/

Depends-on: Ib4ab9ca9dc72b30151154f3f96037f9ce3c9c540
Change-Id: I5b58d872c9b4842fae5f2e7a4ddfc6662a6c8d7a
Implements: blueprint backup-snapshots

This patch adds the ability to reset the state of
a backup with the command backup-reset-state.

DocImpact

Change-Id: I5851bb21c62252f61ad6a09f01859582e774a9db
Closes-Bug: #1279764

Snapshot and backups pagination was recently implemented in the Cinder
backend. This patch is implementing a pagination for the snapshots and
backups on the client side in the same way that volume pagination works
using limit, marker and sort parameters.

Partial-Implements: blueprint extend-limit-implementations
Change-Id: Ie3660854407a947f7470b4dc0911704c0a31c1b4

There are three resources: VolumeBackup, Snapshot, VolumeTransfer.
None of them can be deleted by using their names on V2.

For example, Snapshot client side filtering fails in the function
findall. The reason is that snapshot object
<class 'cinderclient.v2.volume_snapshots.Snapshot'> does not have
a attribute 'display_name'.

The response of /v2/{tenant_id}/backups/detail does not have
a parameter 'display_name', but have a parameter 'name'.
So class Snapshot does not need to define NAME_ATTR = 'display_name'.
The superclass of Snapshot 'Resource' has defined NAME_ATTR = 'name'.

Closes-Bug: #1497873
Closes-Bug: #1495428
Change-Id: I3c89fd9a82918e8a02385cfccb32dc9c3f4c4095

This is the CLI change required to support non-disruptive backup
for volumes in 'in-use' status. A force flag is added to the create
backup CLI. The force flag needs to be True when backing up an
'in-use' volume. By default it is False and it is not needed when
backing up an 'available' volume.

The Cinder server side change is merged:
https://review.openstack.org/#/c/193937/

Partial-implements blueprint non-disruptive-backup

Change-Id: I53aff3973cc6365a5b1d40c21b0885c1d8166df5

Also added support '--name', '--status', '--volume-id' arguments
for cinder backup-list.

DocImpact
Closes-Bug: #1422046
Depends On: I73f6377c7d6fd92d0464d13f9c8dd6682fef78e3
Change-Id: I5f2ab6370a8333a9ee498c6158037b0433f36a23