Update git submodules

Update git submodules

* Update docs/submodules/oom.git from branch 'master'
  to 20bb4fcf736c3e1763efcab2f7802f6cfca34920
  - Update git submodules

    * Update kubernetes/robot from branch 'master'
      to 9480bfde7918617339de458fdd0c44d7b0e4739b
      - property clean up add

        Issue-ID: TEST-184
        Change-Id: Ic4dd2cad5025d49da288ac272d66f6c9221d34dc
        Signed-off-by: DR695H <dr695h@att.com>
      - ROBOT test cases improvements for PnP PNF in El Alto release

        Issue-ID: INT-1179

        Signed-off-by: Krzysztof Kuzmicki <krzysztof.kuzmicki@nokia.com>
        Change-Id: I6976867800e12b0dc3a145340db87e7bbfb4841f

      - combine properties file

        since all the props are set by helm there is no need for seperate
        parameters. This has the benefit of allowing global properties to use
        global injected (and vice versa) inside the property file

        Issue-ID: TEST-184
        Change-Id: Ic011aa9173a6073a1c389b6d1ceef6235c4e40a1
        Signed-off-by: DR695H <dr695h@att.com>