Update git submodules

Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "xci: Enable Functest Healthcheck for Kubernetes scenarios"
  - xci: Enable Functest Healthcheck for Kubernetes scenarios

    This change enables Functest for kubernetes scenarios but any change
    that impacts kubernetes scenarios will fail and block the change from
    merging until the prepare-functest playbook and role are fixed in
    releng-xci.

    Change-Id: I046e3a0fb9a211cf9d629899017922288d466b0c
    Signed-off-by: Fatih Degirmenci <fdegir@gmail.com>