Update git submodules

Update git submodules

* Update docs/submodules/oom/offline-installer.git from branch 'master'
  to fe952c38968cf68cb1003cec42b6b56f1bee8b2c
  - Fix 'cleanup' stage in 'nfs' role test

    This commit reverts removal of 'ignore_unreachable'
    option in 'cleanup.yml' for 'nfs' role tests in
    96a4baf. It's needed for cleanup stage to succeed
    if called prior to 'create' stage (default 'test'
    matrix behaviour)

    Change-Id: I9177fb950786f05a55c45a0089fb3632503f14f5
    Issue-ID: OOM-1809
    Signed-off-by: Bartek Grzybowski <b.grzybowski@partner.samsung.com>