Update git submodules

Update git submodules

* Update docs/submodules/oom.git from branch 'master'
  to 8f9e119c3c3a98a0757b14b9b9da6404d6b81d28
  - Merge "MetalLB install script for bare metal cluster"
  - MetalLB install script for bare metal cluster

    If Ingress controller is exposed via NodePort
    it listens on non standard port, so it can be
    quite problematic.  Exposing via LoadBalancer
    doesn't work properly on bare metal Kubernetes
    cluster, so external LB solution is needed.

    Signed-off-by: Lucjan Bryndza <l.bryndza@samsung.com>
    Change-Id: I9a2032e8501caca7c3a564f6bbcf969fdde31da2
    Issue-ID: OOM-2346