"transfer-accept" doesn't respect quota per_volume_gigabytes

[Cao ShuFeng]

With "transfer-accept" user can accept a volume which is larger than quota "per_volume_gigabytes".

Reproduce steps:
1. update tenant demo's per_volume_gigabytes to 1.
    $ cinder quota-update --per-volume-gigabytes 1 bac0caa2d69947b78fc3c77b156e13a5

2. create a 2 gb volume in tenant admin, and create a transfer from the volume.
    $ export OS_TENANT_NAME=admin
    $ export OS_USERNAME=admin
    $ cinder create 2
    $ cinder transfer-create bf913e66-5cfe-43e7-8721-59d94882ba7a

3. use tenant demo to accept the volume
    $ export OS_TENANT_NAME=demo
    $ export OS_USERNAME=demo
    $ cinder transfer-accept 47561a3c-a4e8-44ca-9b6f-41372470c933 e9b7fc648da8b6f8

Now demo get a volume in size 2G, even if it's per_volume_gigabytes is 1G.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/322405

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/322405
Committed: https://git.openstack.org/cgit/openstack/cinder/commit/?id=76d7a37afe386ae8ea272faed84d73a2538f72d3
Submitter: Jenkins
Branch: master

commit 76d7a37afe386ae8ea272faed84d73a2538f72d3
Author: Cao ShuFeng <email address hidden>
Date: Sat May 28 05:33:41 2016 -0400

    check quota per_volume_gigabytes for transfer-accept

    Now user can accept a volume which is larger than quota
    "per_volume_gigabytes". With this change, an exception is returned
    to user if the accepting volume is larger than per_volume_gigabytes.

    Change-Id: Ia7809be2ec69b827b2b2a132d598f0cb3eaccff4
    Closes-bug: #1586593

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/cinder 9.0.0.0rc1 release candidate.