Update git submodules

Update git submodules

* Update docs/submodules/oom/offline-installer.git from branch 'master'
  to f57c79c20558284dc3515eba0e229b1661a33e90
  - Merge "Make simplified version of build_nexus_blob.sh"
  - Make simplified version of build_nexus_blob.sh

    Removed requirement for configuration file with a lot of necessary
    inputs from user

    Removed dependency resolution for RHEL systems

    Added interconnect with the whole offline-installer build process from
    list generating to packaging

    Removed creating of nexus_data tarball

    Small improvements of the process

    Issue-ID: OOM-1704

    Change-Id: Idd34e1a6bf160ec40413db16138c849334d9ca44
    Signed-off-by: Tomáš Levora <t.levora@partner.samsung.com>