Comment 3 for bug 1858841

Reviewed: https://review.opendev.org/701605
Committed: https://git.openstack.org/cgit/openstack/tempest/commit/?id=c1b2a4a71b98167213fa268e993044a5c9b5ef56
Submitter: Zuul
Branch: master

commit c1b2a4a71b98167213fa268e993044a5c9b5ef56
Author: Lee Yarwood <email address hidden>
Date: Wed Jan 8 17:02:49 2020 +0000

    waiters: Add wait_for_volume_attachment_remove

    This change adds a specific waiter for tracking the removal of
    attachments from a volume. This should allow callers to track the
    detaching of multiattached volumes from instances while the volume
    remains in an `in-use` state.

    Related-bug: #1858841
    Change-Id: I85917f683d2bc81fdf3f6d3351bf56fdb649740e