Update git submodules

Update git submodules

* Update docs/submodules/oom/offline-installer.git from branch 'master'
  to ee157b53be7c176081aed96a74fe8ff09b208cb8
  - Cleanup Rancher containers after Molecule converge

    Rancher role test do remove rancher/agent and rancher/server
    containers at 'cleanup' stage but Rancher Agent spawned
    containers are left orphaned. This patch adds tasks to
    remove them.

    This patch also adds custom ansible module for listing
    docker containers (as of ansible 2.7.10 no upstream module
    provides that feature, even new docker_container_info info
    module in ansible's devel branch doesn't have it)

    Change-Id: I6325dc81063b55b70136280273f8f6138c7a0375
    Issue-ID: OOM-1811
    Signed-off-by: Bartek Grzybowski <b.grzybowski@partner.samsung.com>