Update git submodules

Update git submodules

* Update docs/submodules/oom.git from branch 'master'
  to 4e782a3510e4e7aaed1b48e371f8536fdd27be53
  - Merge "Remove obsolete warning about concurrent executions"
  - Remove obsolete warning about concurrent executions

     Remove warning about unparameterized --display as it is
     now parameterized (this commit is a follow-up to comments
     in already merged https://gerrit.onap.org/r/#/c/87357/)

     Added also brackets for namespace parameter in usage guide

    Change-Id: I78a753b026e3e9b410798687b28ad0ca1115703e
    Issue-ID: OOM-1844
    Signed-off-by: kaihlavi <l.kaihlavirt@partner.samsung.com>