Update git submodules

Update git submodules

* Update docs/submodules/oom.git from branch 'master'
  to c53ff54815a8d716c12395293a8c75a5b6a7fa91
  - [SO] Use common secret template in so

    Generate passwords for:
    - so_user
    - so_admin

    and distribute them to all SO subcharts.

    mariadb-galera root password is taken as a reference to existing
    secret (shared mariadb instance) or also generated if local cluster is
    used.

    Three other DB users also have generated passwords but they are not
    distributed outside of so-mariadb as they were never used.

    Issue-ID: OOM-2328
    Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com>
    Change-Id: Ic4af5c9b12b00d2a52d2597e3fe1161d0d1a9f20

  - [SO] Use common secret template in so-mariadb

    When porting so-mariadb component I've not noticed a few DB
    credentials hardcoded in shell scripts...

    Let's fix this and move all of them to common secret template

    Issue-ID: OOM-2328
    Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com>
    Change-Id: I8b42b22b1eb67ee8f15aebf0f4fccaa62cf6fde5