Comment 7 for bug 1687511

Reviewed: https://review.openstack.org/461803
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=e59eee6db5876fa86954f1cab10c667c80f35763
Submitter: Jenkins
Branch: master

commit e59eee6db5876fa86954f1cab10c667c80f35763
Author: Sean Dague <email address hidden>
Date: Tue May 2 10:16:51 2017 -0400

    Use systemctl to restart services

    The restart code for the live migration configure on the fly tests was
    really really fragile clippings of old bits of devstack code that
    barely worked (and assumed a very specific run environment).

    Given that we're going to get rid of everything other than systemd in
    devstack, just jump straight to using systemd primitives here. This
    dramatically simplifies the code, and will ensure things actually
    restart correctly.

    Closes-Bug: #1687511

    Change-Id: I914430d68f64d29932c9409d055b15e4cb384ec4