NetApp SSC job does not run periodically

[Masaki Kanno]

SSC (storage service catalog) job does not run periodically.
NetApp cDOT driver is supposed to run SSC job at intervals of 1800 seconds.
However, after SSC job run when cinder-volume services were started,
SSC job does not run again.
The driver confirms 1800 seconds passed from last SSC job run by using
"is_newer_than" method of oslo_utils, but I think that the driver has to
use "is_older_than" method of oslo_utils.

oslo_utils/timeutils.py:

  def is_older_than(before, seconds):
      """Return True if before is older than seconds."""
      if isinstance(before, six.string_types):
          before = parse_isotime(before)

      before = normalize_time(before)

      return utcnow() - before > datetime.timedelta(seconds=seconds)

  def is_newer_than(after, seconds):
      """Return True if after is newer than seconds."""
      if isinstance(after, six.string_types):
          after = parse_isotime(after)

      after = normalize_time(after)

      return after - utcnow() > datetime.timedelta(seconds=seconds)

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/208144

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/208144
Committed: https://git.openstack.org/cgit/openstack/cinder/commit/?id=3b9a7900e541574f809435c2d5625b58f9b8c1d6
Submitter: Jenkins
Branch: master

commit 3b9a7900e541574f809435c2d5625b58f9b8c1d6
Author: Masaki Kanno <email address hidden>
Date: Sat Aug 1 17:40:39 2015 +0900

    NetApp SSC job will be run periodically

    NetApp cDOT driver is supposed to run SSC job at intervals of 1800
    seconds. However, after SSC job ran when cinder-volume services
    were started, SSC job does not run again.
    The driver should use 'is_older_than' method of oslo_utils to
    confirm 1800 seconds passed from last SSC job.

    Change-Id: I9d975f66295b75e3bfda47c56bbb11de0e9bf6d0
    Closes-Bug: #1478432