Update git submodules

Update git submodules

* Update docs/submodules/oom.git from branch 'master'
  to 8b6aca77c122a18be98ef09d5dad13493c367035
  - Merge "[POLICY] legacy PDP healtchcheck removed"
  - [POLICY] legacy PDP healtchcheck removed

    It may be causing some flakiness with some healthchecks
    passing in OOM builds.   Not sure the root cause, as the
    problem happens occassionally, may be a race condition or
    something else (legacy PDP and dependent components may
    take some time to initialize).

    Issue-ID: POLICY-2471
    Signed-off-by: jhh <jorge.hernandez-herrero@att.com>
    Change-Id: I8ab7c8c563c1db13b2a99aa8cb6f3c022c625642