Update git submodules

Update git submodules

* Update docs/submodules/oom/offline-installer.git from branch 'master'
  to 67acfb594844515aa07f5d292f334a93ab92f0a2
  - Add kubernetes dashboard

    Either run kubectl proxy, but you must setup routes or kubectl on some
    node (only infra has kubectl by default). Another option is connecting
    onto the node where the dashboard is exposed via NodePort. Instructions
    are here:
    https://github.com/kubernetes/dashboard/wiki/Accessing-dashboard
    (1.7.X and above)

    Change-Id: I5a28f458c0ae949278b1e6eaf6eb063d09f93fc0
    Issue-ID: OOM-1778
    Signed-off-by: Petr Ospalý <p.ospaly@partner.samsung.com>
    Signed-off-by: Michal Zegan <m.zegan@samsung.com>