Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Initiate packetization of Testing reporting"
  - Initiate packetization of Testing reporting
    
    Testing reporting provides
    - static reporting pages [1] (jinja2)
    - landing pages including test case catalogue [2] (angular)
    
    It consumes the Test API to build web pages providing status for
    the testing projects (so far functest, yardstick, storperf and
    qtip).
    
    Dockerization has been initiated [3]. The goal is to replace the
    static page hosted on testresults.opnfv.org by a docker regenerated
    and redeployed when reporting code is changed
    
    But the docker and more generally the testing reporting directory
    must be refactored to
    - manage dependencies properly
    - leverage tox (py27, docs, pylint, pep8)
    
    This patch
    - setups tox (py27, pep8, pylint, docs)
    - integrate the requirement management
    - fix pep8 errors
    - introduce 1 dummy unit test
    
    This patch does not
    - fix pylint errors
    - create any doc
    
    [1]: http://testresults.opnfv.org/reporting2/display/index.html
    [2]: http://testresults.opnfv.org/reporting2/reporting/index.html
    [3]: https://gerrit.opnfv.org/gerrit/#/c/36735/
    
    Change-Id: I4613de7ca7036d6c6bbb8f58ade492b1d673599b
    Signed-off-by: Morgan Richomme <morgan.richomme@orange.com>
    

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