Update git submodules

* Update docs/submodules/multicloud/k8s.git from branch 'master'
  to c6d4c95561d1d1a783ca0e1176d794b3fa0fdb31
  - Merge "Update setup.sh script"
  - Update setup.sh script

    This script was changed some instructions which was reported by
    shellcheck tool and fix some non-ubuntu instructions.

    Change-Id: If7dce994f024d99aa8f4d306da928e616774b013
    Signed-off-by: Victor Morales <victor.morales@intel.com>
    Issue-ID: MULTICLOUD-301

diff --git a/docs/submodules/multicloud/k8s.git b/docs/submodules/multicloud/k8s.git
index 58f8933..c6d4c95 160000 (submodule)
--- a/docs/submodules/multicloud/k8s.git
+++ b/docs/submodules/multicloud/k8s.git
@@ -1 +1 @@
-Subproject commit 58f8933d2df7c2601bbdff7bfec1652b48946138
+Subproject commit c6d4c95561d1d1a783ca0e1176d794b3fa0fdb31