Update git submodules

Update git submodules

* Update docs/submodules/oom.git from branch 'master'
  to 5d620cbbd75517d6d60600debe0f5f5281538580
  - Merge "Add ONAP core deployment type override"
  - Add ONAP core deployment type override

    This patch makes heavy use of Orange accomplishments [1][2][3]. This
    deployment override will probably succeed "minimal-onap.yaml" used in
    e.g. "integration/bootstrap/vagrant-minimal-onap" setup.

    Cassandra replicaCount is increased to 3 to allow reaching quorum.

    [1] https://gitlab.com/Orange-OpenSource/lfn/onap/onap_oom_automatic_installation
    [2] https://wiki.lfnetworking.org/display/LN/Call%20for%20ONAP%20DDF%20Topics%20-%20Prague%202020#CallforONAPDDFTopics-Prague2020-OOM-IntroductionofServicemesh
    [3] https://wiki.lfnetworking.org/download/attachments/25364127/OOM%20Service%20Mesh%20Prague.pptx

    Issue-ID: ONAPARC-551
    Change-Id: Ibaec41f088f11f7fb4e7c476f742d12d29c5740b
    Signed-off-by: Pawel Wieczorek <p.wieczorek2@samsung.com>