Update git submodules

Update git submodules

* Update docs/submodules/oom/offline-installer.git from branch 'master'
  to e7fd64586455a7c1270c1b1c846c19e030780315
  - Merge "Don't set 'container' env in Molecule containers"
  - Don't set 'container' env in Molecule containers

    Molecule role tests that use pre build images had
    superfluous 'container' env variable declaration.
    It's not needed as this env is already set in
    Dockerfiles, for both: pre-built and custom built
    images.

    Change-Id: Iee9cc38919da894ee6cc6a2a5f1acc60d76865de
    Issue-ID: OOM-1841
    Signed-off-by: Bartek Grzybowski <b.grzybowski@partner.samsung.com>