Update git submodules

Update git submodules

* Update docs/submodules/multicloud/k8s.git from branch 'master'
  to 352080a39d582a767d5908ab3372ac10d59a2261
  - vFW usecase update

    Update vFw Uses case to use 1.5.0
    artifacts. 1.3.1 artifacts were
    removed from nexus this week.
    Changed sink container to remove IP
    addresses that are built in the image and
    can't be changed or parametrized. Added
    a configmap for sink container

    Change-Id: Ib1aae1816de866889e93d61a77832680764acef6
    Issue-ID: MULTICLOUD-623
    Signed-off-by: Ritu Sood <ritu.sood@intel.com>