Update git submodules

Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Fix name in setup.py"
  - Fix name in setup.py

    It fixes duplicated names between setup.py and modules/setup.py.

    We could also have considered listing releng utils as scripts in
    modules/setup.py which is mandatory if another OPNFV project needs
    them (eg Functest before [1] was merged).
    They could be required in case of functional or unit testing too.

    [1] https://gerrit.opnfv.org/gerrit/#/c/35199/

    Change-Id: Ic77f4e46d6d3396f9891b73105a0eb7aa037754f
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>