Update git submodules

* Update osc-placement from branch 'master'
  - Use PlacementFixture in functional tests
    
    Change the functional tests to use the PlacementFixture instead
    of devstack as the source of a placement API. This speeds up
    the tests considerably and lowers the number of dependencies.
    
    There are four primary changes:
    
    * For each test a PlacementFixture is instantiated, using the
      usual in-RAM db and in-process placement.
    
    * Because of some exceedingly confusing optimizations in
      osc_lib and python-openstackclient, done to improve start
      up time, a session to placement was caching the service
      url. This meant that after a first test succeeded, every
      subsequent one would not because it was trying to talk
      to a fake hostname that was no longer being intercepted.
    
      The workaround for this was to monkeypatch the method
      in the ClientCache class which provides access to a client (per
      service-type). The replacement method makes a new client
      every time.
    
    * The previous tests would subprocess out to a real call of
      the openstack command and then interpret the results.
    
      Now, a run() method on OpenStackShell is called instead.
      This accepts arguments in the same way, but we need to
      a) capture stderr and stdout, b) make a try/except for
      SystemExit to get some error responses (mostly from
      the argparse lib which has a tendency to exit for you
      instead of politely telling you it wants to), c) deal
      with errors from commands ourself rather than using
      exceptions from the subprocess module.
    
      Switching to this form means that logging becomes in-process
      and more visible. To accomodate this the Capture fixture
      from placement is used. This was chosen because we are already
      pulling in the PlacementFixture. If this seems icky, I can fix
      it with a local one. This was the shorter path.
    
    * The legacy dsvm jobs have been removed in favor of "standard"
      functional jobs for 2.7 and 3.6 that require openstack/placement.
      The playbooks associated with the legacy jobs are removed.
    
      tox.ini is adjusted to reflect this new setup. Because tox-siblings
      functional is being used, we don't want to share tox envs with the unit
      tests. The 3.5 functional job is removed because we no longer target
      that.
    
    After running these for a while it became clear that there were
    intermittent failures being caused by subunit attachments being too
    large. This was eventually traced back to logging from all packages
    being set to DEBUG even when something else was requested. That was
    traced back to a poor interaction between the way that osc does
    logging and the way oslo_logging does logging (used by placement and
    thus the placement fixture). The workaround, embodied in the
    RESET_LOGGING list in osc_placement/tests/functional/base.py, is to
    get and reset the log level for a subset of the packages that are
    used.
    
    Change-Id: I7deda200b372ff6a7ba67b0c4fa0e53c4fa16ffc
    Story: 2005411
    Task: 30428
    
  - OpenDev Migration Patch
    
    This commit was bulk generated and pushed by the OpenDev sysadmins
    as a part of the Git hosting and code review systems migration
    detailed in these mailing list posts:
    
    http://lists.openstack.org/pipermail/openstack-discuss/2019-March/003603.html
    http://lists.openstack.org/pipermail/openstack-discuss/2019-April/004920.html
    
    Attempts have been made to correct repository namespaces and
    hostnames based on simple pattern matching, but it's possible some
    were updated incorrectly or missed entirely. Please reach out to us
    via the contact information listed at https://opendev.org/ with any
    questions you may have.

osc-placement

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-Subproject commit cf0d72191fd608f8203935cd8d17baeb643a0df8
+Subproject commit da8cd4d68b06399c607776db2a704b4578146996