Update git submodules

* Update docs/submodules/multicloud/k8s.git from branch 'master'
  to 6d7edc7d8afe1397b877cb18371304e581538be7
  - Remove unused ovn-kubernetes

    Removing unsused ovn-kubernetes
    playbook and test from KUD.
    Currently there is no plan to use
    and also this is untested.

    Issue-ID: MULTICLOUD-684
    Signed-off-by: Ritu Sood <ritu.sood@intel.com>
    Change-Id: I684bf82c7d4ab6d051178a027a385923ec9c4f2b

diff --git a/docs/submodules/multicloud/k8s.git b/docs/submodules/multicloud/k8s.git
index 4655f55..6d7edc7 160000 (submodule)
--- a/docs/submodules/multicloud/k8s.git
+++ b/docs/submodules/multicloud/k8s.git
@@ -1 +1 @@
-Subproject commit 4655f550c8c03a6384fa90746f1af021348ec6ef
+Subproject commit 6d7edc7d8afe1397b877cb18371304e581538be7