Update git submodules

* Update docs/submodules/multicloud/k8s.git from branch 'master'
  to c77850a75eee9f3df2e194521e59728572bc47c2
  - remove the outdated SDWAN testing
    
    Issue-ID: MULTICLOUD-1071
    Signed-off-by: Kuralamudhan Ramakrishnan <kuralamudhan.ramakrishnan@intel.com>
    Change-Id: Ia3818ee16393d8e8b2d465d354ce777192baca9e
    
diff --git a/docs/submodules/multicloud/k8s.git b/docs/submodules/multicloud/k8s.git
index 22a56b4..c77850a 160000
--- a/docs/submodules/multicloud/k8s.git
+++ b/docs/submodules/multicloud/k8s.git
@@ -1 +1 @@
-Subproject commit 22a56b401408ad2d3f0d77c245cc2c69df83e456
+Subproject commit c77850a75eee9f3df2e194521e59728572bc47c2