generic driver does not update export location on manage operation

[Valeriy Ponomaryov]

Recently was added manage/unmanage support to generic driver. And it does not update export location of managed share.

So, if user provide properly structured export but with incorrect IP address, then manila will not change it, but should set up
proper export locations and remove one provided by user.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/165895

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/165895
Committed: https://git.openstack.org/cgit/openstack/manila/commit/?id=d47e03779cc92d2ab94d5436de2ffae5db3b028e
Submitter: Jenkins
Branch: master

commit d47e03779cc92d2ab94d5436de2ffae5db3b028e
Author: Valeriy Ponomaryov <email address hidden>
Date: Thu Mar 19 14:31:28 2015 +0200

    Make generic driver update export location after manage operation

    Recently was added support of manage/unmanage operations to deneric driver.

    But it does not update export locations according to server info.
    So, make driver update it and add appropriate change to share manager to
    expect export locations.

    Change-Id: I50726ce0b82b50363f5651ffced8b6cb9f0d853f
    Closes-Bug: #1434009