Comment 82 for bug 1517839

Reviewed: https://review.openstack.org/334868
Committed: https://git.openstack.org/cgit/openstack/cinder/commit/?id=ccd8abb7f10073905162c168e5fcb5a819871cf7
Submitter: Jenkins
Branch: master

commit ccd8abb7f10073905162c168e5fcb5a819871cf7
Author: ChangBo Guo(gcb) <email address hidden>
Date: Tue Jun 28 16:49:18 2016 +0800

    Fix wrong usage of config option gpfs_images_share_mode

    Config option gpfs_images_share_mode with parameter choices=['copy',
    'copy_on_write', None], that means any other value will raise
    ValueError, the check is done by the configuration parser, so no
    invalid value will be accepted and the driver doesn't need to check it
    again. For more details when we set method set_override with paramter
    enforce_type=True, please see: http://paste.openstack.org/show/523740/

    Related-Bug: 1517839

    Change-Id: I000ab639e68534e7be111cc3759b6ae1dffd5520