Comment 9 for bug 1446750

Reviewed: https://review.openstack.org/216728
Committed: https://git.openstack.org/cgit/openstack/cinder/commit/?id=9889f96afdc81442fd4b1966777a8dcd143e243e
Submitter: Jenkins
Branch: master

commit 9889f96afdc81442fd4b1966777a8dcd143e243e
Author: Szymon Wroblewski <email address hidden>
Date: Thu Aug 20 14:13:31 2015 +0200

    Support initialization state in Backup Manager

    This commit adds is_working method to Backup Manager class to
    return initialization state of the underlying volume drivers and
    indicate that service has some problems and isn't running correctly.
    This is used to block refreshing Service heartbeats if Manager will
    return False from is_working.

    Related-Bug: 1446750
    Change-Id: I3165d01f60bd80ead5163d8678886bd2828af3f9