Update git submodules

Update git submodules

* Update docs/submodules/oom.git from branch 'master'
  to e21978408ab1bee4c571bbb6cc58904d3ee36472
  - Merge "Add password generation template"
  - Add password generation template

    Currently there is a number of hardcoded passwords in OOM helm charts
    that are reused for almost all ONAP deployments in different labs.

    One possible solution for this issue could be to generate a random
    password for every deployment but this may cause number of issues
    while doing helm upgrade.

    That's why instead of generating a random password we generate a
    password for particular use case, based on chart name, master
    password provided by the deployer and additional UID. This is done
    using derivePassword function so check its documentation for more
    details how this password is derived.

    From a user perspective, the most important fact is that he or she can
    achieve reproductible deployment. Every time when ONAP is deployed
    with the same masterPassword all derived passwords are going
    to be also the same.

    Issue-ID: OOM-2052
    Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com>
    Change-Id: I666d597e6daab8b79e630917ad75f17cc70f897b