Update git submodules

* Update pycadf from branch 'master'
  - Add release note for MD5 hash removal
    
    The use of MD5 was removed in Icaeb3305c788db2913fe99792ea6311d218b3410.
    This just adds a release note to communicate that to consumers.
    
    Change-Id: I6a6487335852a71c3f5591c9bfc7acd6bd14cd0d
    
  - Change openstack-dev to openstack-discuss
    
    Mailinglists have been updated. Openstack-discuss replaces openstack-dev.
    
    Change-Id: Ice8af70eaeca739698a07eed123594dac1503096
    
  - Enabling FIPS mode by using sha256 instead of md5
    
    FIPS does not allow md5, some systems like RHEL needs to have FIPS
    compliance, in order to execute some routines like when try to
    use keystone-manage. As a general rule, we should avoid using md5
    if we can and move over to SHA wherever possible.
    
    Change-Id: Icaeb3305c788db2913fe99792ea6311d218b3410
    Closes-Bug: #1767024
    
  - Merge "Use templates for cover and lower-constraints"
  - Don't quote {posargs} in tox.ini
    
    Quotes around {posargs} cause the entire string to be combined into one
    arg that gets passed to stestr. This prevents passing multiple args
    (e.g. '--concurrency=16 some-regex')
    
    Change-Id: Ib74244eea0ff4fa37dc3308360691059c6fa448b
    
  - Use templates for cover and lower-constraints
    
    Small cleanups:
    
    * Use openstack-tox-cover template, this runs the cover job
      in the check queue only. Remove individual cover jobs.
    * Use openstack-lower-constraints-jobs template, remove individual
      jobs.
    * Sort list of templates
    
    Fix cover job, $project is not expanded in tox.ini and thus the job
    fails. Use "pycadf" instead.
    
    Change-Id: I72da23a0d6c6b3cc87e66d94c419668fce66e704
    
  - add lib-forward-testing-python3 test job
    
    This is a mechanically generated patch to add a functional test job
    running under Python 3 as part of the python3-first goal.
    
    See the python3-first goal document for details:
    https://governance.openstack.org/tc/goals/stein/python3-first.html
    
    Change-Id: I3cf9c67c603496ea777b07fe266df1bb65727206
    Story: #2002586
    Task: #24304
    
  - add python 3.6 unit test job
    
    This is a mechanically generated patch to add a unit test job running
    under Python 3.6 as part of the python3-first goal.
    
    See the python3-first goal document for details:
    https://governance.openstack.org/tc/goals/stein/python3-first.html
    
    Change-Id: Ie8632282d70dcd0ce75d0352eb83bac9846134c9
    Story: #2002586
    Task: #24304
    
  - switch documentation job to new PTI
    
    This is a mechanically generated patch to switch the documentation
    jobs to use the new PTI versions of the jobs as part of the
    python3-first goal.
    
    See the python3-first goal document for details:
    https://governance.openstack.org/tc/goals/stein/python3-first.html
    
    Change-Id: Ie60add7e0451511d661bc98f7c41170e7289e93f
    Story: #2002586
    Task: #24304
    
  - import zuul job settings from project-config
    
    This is a mechanically generated patch to complete step 1 of moving
    the zuul job settings out of project-config and into each project
    repository.
    
    Because there will be a separate patch on each branch, the branch
    specifiers for branch-specific jobs have been removed.
    
    Because this patch is generated by a script, there may be some
    cosmetic changes to the layout of the YAML file(s) as the contents are
    normalized.
    
    See the python3-first goal document for details:
    https://governance.openstack.org/tc/goals/stein/python3-first.html
    
    Change-Id: If97c62d66c86cd0cd62f647155178ed63dbc4db0
    Story: #2002586
    Task: #24304
    
  - Switch to stestr
    
    According to Openstack summit session [1],
    stestr is maintained project to which all Openstack projects should migrate.
    Let's switch to stestr as other projects have already moved to it.
    
    [1] https://etherpad.openstack.org/p/YVR-python-pti
    
    Change-Id: Ib4c7bb59c92946c3e8b257cbf1ce2f44cb1c40ed
    
  - Merge "Remove moxstubout usage"
  - fix tox python3 overrides
    
    We want to default to running all tox environments under python 3, so
    set the basepython value in each environment.
    
    We do not want to specify a minor version number, because we do not
    want to have to update the file every time we upgrade python.
    
    We do not want to set the override once in testenv, because that
    breaks the more specific versions used in default environments like
    py35 and py36.
    
    Change-Id: I370e66f1a4f4a0af629afa109d51d095a4700327
    Signed-off-by: Doug Hellmann <doug@doughellmann.com>
    
  - Remove moxstubout usage
    
    As of version 3.5.0 moxstub will be deprecated,
    so remove it where it has been used.
    
    Change-Id: I033646a1e32a44dea54d902c43bb4def9da89b33
    Signed-off-by: Charles Short <zulcss@gmail.com>
    
  - Merge "add lower-constraints job"
  - add lower-constraints job
    
    Create a tox environment for running the unit tests against the lower
    bounds of the dependencies.
    
    Create a lower-constraints.txt to be used to enforce the lower bounds
    in those tests.
    
    Add openstack-tox-lower-constraints job to the zuul configuration.
    
    See http://lists.openstack.org/pipermail/openstack-dev/2018-March/128352.html
    for more details.
    
    Change-Id: I44a46d05b5818c30657f123ae714b4189c506aae
    Depends-On: https://review.openstack.org/555034
    Signed-off-by: Doug Hellmann <doug@doughellmann.com>
    
  - Merge "Trivial: Update pypi url to new url"
  - Trivial: Update pypi url to new url
    
    Pypi url changed from [1] to [2]
    
    [1] https://pypi.python.org/pypi/<package>
    [2] https://pypi.org/project/<package>
    
    Change-Id: Idf7bf448a1066d343c8db95e94c01310d943c6ad
    
  - Updated from global requirements
    
    Change-Id: Ie1d30c876d404b0396134b82a3e401c1376d9d70

pycadf

@@ -1 +1 @@
-Subproject commit 19583c041eaf49ddb824ca16310da75983f57c12
+Subproject commit 4398b7d34e40f250a42e2ba537ca995a8c37376d