Update git submodules

Update git submodules

* Update docs/submodules/oom/offline-installer.git from branch 'master'
  to 293ad25456bb37dbd6827d26f87e495a2b7f1b85
  - Merge "Make molecule tests for certificates independent from docker role"
  - Make molecule tests for certificates independent from docker role

    Currently molecule tests for certificates role call the
    docker role just to make one handler available.
    It actually breaks best practices of unit testing,
    the docker role shouldn't be called nor tested in
    unit test of certificates role.
    This commit makes certificates role independent by just
    creating fake handlers.

    Change-Id: Iec7934c7c1f4e9b37ff523e1d86a3beaaa88bdcf
    Issue-ID: OOM-1864
    Signed-off-by: Michal Zegan <m.zegan@samsung.com>