Update git submodules

Update git submodules

* Update docs/submodules/oom.git from branch 'master'
  to 5878b3db688aa32ffa4af2e88ba96eaf68f92871
  - Merge "[COMMON] Don't create dummy mysql DB by default in a shared instance"
  - [COMMON] Don't create dummy mysql DB by default in a shared instance

    When deploying a shared mariadb-galera instance using common chart
    a dummy database is created based on the default values n the chart.

    This is obviously unnecessary and creates an obviousl security issue.
    That's why let's make sure that when we deploy a shared mariadb
    instance no dummy databases are created.

    Issue-ID: OOM-2053
    Change-Id: I1130cb8eb555b15a2d8b365102d69e32259233eb
    Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com>