A progress bar showed but shelve-offload finished

[Eric Xie]

Instance shelve-offload finished successfully, but a progress bar still existed in "status" of instance.

reproduce:
1. create one instance;
2. shelve, shelve-offload the instance;
3. check the instance page of project on dashboard.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/144583

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/144583
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=2f68530a3cf18f2004042727120b16bd543e39df
Submitter: Jenkins
Branch: master

commit 2f68530a3cf18f2004042727120b16bd543e39df
Author: liyingjun <email address hidden>
Date: Wed Dec 31 14:04:26 2014 +0800

    Do not show progress bar for shelved instance

    Add shelved:True to instance status mapping to disable progress
    bar when a instance is shelved.

    Change-Id: Iad5cdce74bce829b11a902f13a774a008c3c425c
    Closes-bug: #1406441