Fix extend share API in Huawei driver

[zhongjun]

Fix extend share API in Huawei driver

Add the judgment condition in extend share. Add
the comparison of new size and current size.
Extend share will be failed when the new size is
less than current size on array.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/210814

[Valeriy Ponomaryov (vponomaryov)]

Hello, zhongjun

This is bug, and it should contain topic that briefly describes problem and description that provides more detailed information on bug - steps to reproduce, logs with errors, etc...

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/210814
Committed: https://git.openstack.org/cgit/openstack/manila/commit/?id=0369f4a524ef0d0404c3fb66c920173545fcfa42
Submitter: Jenkins
Branch: master

commit 0369f4a524ef0d0404c3fb66c920173545fcfa42
Author: zhongjun <email address hidden>
Date: Sun Aug 9 18:37:06 2015 +0800

    Fix extend share API in Huawei driver

    Add the judgment condition in extend share. Add
    the comparison of new size and current size.
    Extend share will be failed when the new size is
    less than current size on array.

    Change-Id: Ifebd5144066a5deea4b3dd4bfd9c016bb36d2263
    Closes-Bug: #1482968