Update git submodules

Update git submodules

* Update docs/submodules/multicloud/k8s.git from branch 'master'
  to f83526881ac7758638b1e7e0e1bcf2ab8cd13133
  - Merge "Add a list api for instances"
  - Add a list api for instances

    curl -X GET /v1/instance
    returns all the instances created.
    It returns abbreviated instances for improved readability.
    For details on what resources were created
    for each instance, use the ID with GET.

    Issue-ID: MULTICLOUD-715
    Change-Id: I05afe0fd2c254acbca4329289c81545f95c9fac5
    Signed-off-by: Kiran Kamineni <kiran.k.kamineni@intel.com>