Huawei driver messages have outdated information

[zhongjun]

- Since "Change REST command" have been merged(see https://review.openstack.org/#/c/213643/),
Several new functions need to be synchronized.
- Change "import _, _LI, _LW" to "import _,
import _LI, import _LW".
- Modify the inaccurate description.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/221176

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/221176
Committed: https://git.openstack.org/cgit/openstack/manila/commit/?id=7b0089ea68c749e9a5331db02e86ba45caf952d3
Submitter: Jenkins
Branch: master

commit 7b0089ea68c749e9a5331db02e86ba45caf952d3
Author: zhongjun <email address hidden>
Date: Tue Sep 8 15:35:03 2015 +0800

    Fix description in Huawei driver

    - Since "Change REST command" have been merged
    (see https://review.openstack.org/#/c/213643/),
    Several new functions need to be synchronized.
    - Change "import _, _LI, _LW" to "import _,
    import _LI, import _LW".
    - Modify the inaccurate description.

    Change-Id: Ibe0e80b98bf19a025f38bc93b2a988bd7f5bad69
    Closes-Bug: #1493236