Update git submodules

Update git submodules

* Update docs/submodules/oom.git from branch 'master'
  to a362d9ba0fd2ece5cd39d4b43ae92ea88486db35
  - Merge "[Policy] Use common mariadb galera chart"
  - [Policy] Use common mariadb galera chart

    Instead of using "own" galera chart, reuse chart placed in common part
    of OOM installation.
    Will ease move to common galera cluster (which is not done by this
    commit).

    Change-Id: I2d7c1e5cdc9289cfb55e288b1697373239ef96e3
    Issue-ID: POLICY-1467
    Signed-off-by: Sylvain Desbureaux <sylvain.desbureaux@orange.com>