Comment 8 for bug 1701545

Reviewed: https://review.openstack.org/480226
Committed: https://git.openstack.org/cgit/openstack/cinder/commit/?id=e8f1b419a4c28c87911063956053fae60c0f9a65
Submitter: Jenkins
Branch: master

commit e8f1b419a4c28c87911063956053fae60c0f9a65
Author: Thomas Bechtold <email address hidden>
Date: Tue Jul 4 15:16:10 2017 +0000

    Revert "Don't use ignoreskipactivation for thin LVM"

    Commit 8f5e10d7ed8eead221cccb6a0ccf1afea310b0a9 wrongly assumed that
    the "ignoreskipactivation" flag is not needed when using thin LVM
    provisioning. This is wrong.
    Using thin LVM leads now to an error when the content will be copied:

    ERROR cinder.volume.manager Command: sudo cinder-rootwrap /etc/cinder/
          rootwrap.conf dd if=/dev/mapper/cinder--volumes-_snapshot--UUID
          of=/dev/mapper/cinder--volumes-volume--UUID
          count=1073741824 bs=1M iflag=count_bytes conv=sparse

    The reason is that the the snapshot is not activated and due to that,
    no device node is available under /dev/mapper .

    This reverts commit 8f5e10d7ed8eead221cccb6a0ccf1afea310b0a9 and makes
    thin provisioning for LVM working again.

    Change-Id: I788b297af92e11063b18c05a415b6f4d4d4bcd2c
    Closes-Bug: #1702322
    Related-Bug: #1701545