Update git submodules

* Update docs/submodules/multicloud/k8s.git from branch 'master'
  to 8c6fb0cbc3cea30f10af0db5a69bc6a601197961
  - Merge "Update Vagrant VM Version"
  - Update Vagrant VM Version

    Fix bug ICN-260 KUD Multi Vagrant 18.04 issue
    Fix bug ICN-303 Compute01 no spcae left in KUD Multi Vagrant

    Issue-ID: MULTICLOUD-1004
    Signed-off-by: Yao Le <le.yao@intel.com>
    Change-Id: Ic74d4ec2c9ae4bbe42c71f13380f779f842e496d

diff --git a/docs/submodules/multicloud/k8s.git b/docs/submodules/multicloud/k8s.git
index a4f31fe..8c6fb0c 160000 (submodule)
--- a/docs/submodules/multicloud/k8s.git
+++ b/docs/submodules/multicloud/k8s.git
@@ -1 +1 @@
-Subproject commit a4f31feda88ba8c5ac9e1cfb1ee78ef536475647
+Subproject commit 8c6fb0cbc3cea30f10af0db5a69bc6a601197961