Delete current status for update volume/volume_snapshot status for admin

[Lawrance]

Now the feature of updating volume/volume_snapshot includes the current status of volume/volume_snapshot, deleting the current status seems more sense

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/191570

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/191570
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=05072672e03736177693911e96bc8f54ee12e8ec
Submitter: Jenkins
Branch: master

commit 05072672e03736177693911e96bc8f54ee12e8ec
Author: jingliuqing <email address hidden>
Date: Sun Jun 14 11:16:13 2015 +0800

    Populate volume/volume_snapshot status without current status

    It includes current status of volume/volume_snapshot while update
    status, the patch populate volume/volume_snapshot status without
    current status.

    Change-Id: I3a9310a551023b7d58627e8d7d31582a2a21516f
    Closes-Bug: 1464946