Added request_ids attribute to resource object for all the
cgsnapshots, consistencygroups, qos_specs, quota_classes,
quotas and services APIs by updating following APIs:

cgsnapshots: delete, update
consistencygroups: delete, update, create
qos_specs: delete, associate, disassociate, disassociate_all
quota_classes: update
quotas: update
services: enable, disable, disable_log_reason

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: I7b399512fcec9ecd31938656deb60e325bb76ad4
Partial-Implements: blueprint return-request-id-to-caller

Replace assertEqual(None, *) with assertIsNone in tests to have
more clear messages in case of failure.

Change-Id: I7ea0306009e8fdde468c1394615972de4d296f45
Closes-Bug:#1280522

This patch adds support for clone CG in cinderclient. It uses the
existing create CG from source command and adds an existing CG as a
source, in addition to a CG snapshot.

The server side patch is merged: https://review.openstack.org/#/c/203473/

Change-Id: I2a923de42348c22c6ae5ff5880cdbe6d719ea0ae
Partial-implements: blueprint clone-cg

This patch addressed the following:
* Added a new CLI to support creating a CG from a CG snapshot.

cinder consisgroup-create-from-src [--cgsnapshot <cgsnapshot>]
                                   [--name <name>]
                                   [--description <description>]

API patch: https://review.openstack.org/#/c/145952/

Partial-Implements: blueprint consistency-groups-kilo-update
Change-Id: I03cce04e1d43ea72fc53a8bf614ba4f969f6e32e

This patch addresses the following:
* Modify Consistency Group
  * Add CLI to update a consistency group, i.e., changing name and
    description, adding existing volumes to CG and removing volumes
    from CG.

cinder consisgroup-update --name <name> --description <description>
    --add-volumes <uuid1,uuid2,...> --remove-volumes <uuid5,uuid6,...>

Implements: blueprint consistency-groups-kilo-update
Change-Id: I76317dc006c1f80e2e6c83218e9566f1d37d935e

This is the first step of moving functional testing
into the project tree.  This change just moves
all of the unit tests to be under a dedicated tests/unit
directory.

Follow up patches will add the functional directory and
start moving tempest CLI tests there.

Change-Id: I9dc0b8f761676c1b3bbdeb03e2f44b35f75c693e