Update git submodules

Update git submodules

* Update docs/submodules/oom/offline-installer.git from branch 'master'
  to 7b2dca8234db9a8b0f57ffc3e0b4f9e680370b32
  - Merge changes from topic "OOM-1810"

    * changes:
      Add verification tests for 'chrony' role
      Setup 'cluster_ip' fact for infra host in 'chrony' role tests

  - Add verification tests for 'chrony' role

    Testinfra tests are added for Molecule verifier.

    Change-Id: Id044cdc5535af97ce3ac48da034a9a6a1ca8cbd3
    Issue-ID: OOM-1810
    Signed-off-by: Bartek Grzybowski <b.grzybowski@partner.samsung.com>
  - Setup 'cluster_ip' fact for infra host in 'chrony' role tests

    This patch sets up a missing 'cluster_ip' fact for
    infrastructure host without which 'server' directive was
    set up improperly in chrony.conf on 'node' host.

    Change-Id: I3d98788b7eb54bf984d165a50072f51fd85c08fb
    Issue-ID: OOM-1810
    Signed-off-by: Bartek Grzybowski <b.grzybowski@partner.samsung.com>