Update git submodules

Update git submodules

* Update docs/submodules/oom.git from branch 'master'
  to c59a59bb4a05ef49132701904635e525d36a2925
  - Merge "[COMMON] Provide convenience templates for mariadb secrets"
  - [COMMON] Provide convenience templates for mariadb secrets

    Usage of plain strings is very fragile especially when you try
    to change them. That's why instead of depending on strings let's
    just define a few convenience templates to be used in projects
    that use mariadb-galera chart.

    Issue-ID: OOM-2249
    Change-Id: Ib867d34090b06a15ea3898a9524f5e3d04a656c0
    Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com>