Update git submodules

* Update docs/submodules/multicloud/k8s.git from branch 'master'
  to 2f86e8e5364339b539313931d7faaf9f9c3896a4
  - Updating multus, SRIOV and nfd test cases
    
    Updating some AddOn test cases and add README.md file.
    
    Issue-ID: MULTICLOUD-1037
    Signed-off-by: marvinYu <weifei.yu@intel.com>
    Change-Id: Iee2c31207cf2cd37fb8119bceef286aa887079f9
    
diff --git a/docs/submodules/multicloud/k8s.git b/docs/submodules/multicloud/k8s.git
index cb00c73..2f86e8e 160000
--- a/docs/submodules/multicloud/k8s.git
+++ b/docs/submodules/multicloud/k8s.git
@@ -1 +1 @@
-Subproject commit cb00c733fc29c715f1f30cbf50534a0811575d7f
+Subproject commit 2f86e8e5364339b539313931d7faaf9f9c3896a4