Comment 5 for bug 1749235

Reviewed: https://review.openstack.org/544015
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=4746a0d63862a4bb06a04636e6c0e4be9b38e82e
Submitter: Zuul
Branch: master

commit 4746a0d63862a4bb06a04636e6c0e4be9b38e82e
Author: Matt Riedemann <email address hidden>
Date: Tue Feb 13 12:19:35 2018 -0500

    Clarify the help text for [scheduler]periodic_task_interval

    There was some confusing/incorrect information in
    the help text about the scheduler driver disabling a service
    via heartbeat, which is not accurate. What this is really trying
    to say is that the ComputeFilter might think a cached compute
    service has outlasted it's report interval and consider it
    down when using the CachingScheduler, which is the only in-tree
    driver that uses this periodic task config option. So this change
    updates the wording a bit.

    Change-Id: I5a31f2c6c9b1bbe892a423ea4e1820eec19c2117
    Related-Bug: #1749235