Comment 9 for bug 1611321

Reviewed: https://review.openstack.org/375601
Committed: https://git.openstack.org/cgit/openstack/compute-hyperv/commit/?id=590e678fcf4fc8eaabf2af51fa3b76a137adbd61
Submitter: Jenkins
Branch: stable/mitaka

commit 590e678fcf4fc8eaabf2af51fa3b76a137adbd61
Author: Lucian Petrut <email address hidden>
Date: Tue Aug 9 13:37:01 2016 +0300

    HyperV: remove instance snapshot lock

    At the moment, the instance snapshot operation is synchronized using
    the instance uuid. This was added some time ago, as the instance
    destroy operation was failing when an instance snapshot was in
    proggress.

    This is now causing a deadlock, as a similar lock was recently
    introduced in the manager for the shelve operation by this change:
    Id36b3b9516d72d28519c18c38d98b646b47d288d

    We can safely remove the lock from the HyperV driver as we now stop
    pending jobs when destroying instances.

    Closes-Bug: #1611321

    Change-Id: I1c2ca0d24c195ebaba442bbb7091dcecc0a7e781
    (cherry picked from commit e4208017feb92de8bfbe1c3b28d6b6e3cea7ab2c)