Update git submodules

Update git submodules

* Update docs/submodules/oom/offline-installer.git from branch 'master'
  to a83ae84c589effcd690180347294ceaa677c2c7b
  - Modify rancher molecule tests to use dind

    This change modifies molecule tests of rancher role to
    use prepare-docker-dind.
    Also:
    - it modifies prepare-common role to retrieve cluster_ip of the actual
    node in question,
    - it fixes the rancher role itself to work at all by removing auto_remove.
    It has been tested by running molecule converge.

    Change-Id: I7af4e9998feedd5f8fc3df8215e03c1b0485529c
    Issue-ID: OOM-1864
    Signed-off-by: Michal Zegan <m.zegan@samsung.com>