Update git submodules

* Update kubernetes/robot from branch 'master'
  to 3b9adc67e6ae2a65480d80dc50cee88b674604a3
  - [Testsuite] bump version 1.7.2 for Guilin RC1
    
    Issue-ID: INT-1768
    
    Signed-off-by: mrichomme <morgan.richomme@orange.com>
    Change-Id: I533da0afac4f853c6ef018f978f05df00e05087e
    
diff --git a/kubernetes/robot b/kubernetes/robot
index da28d1c..3b9adc6 160000
--- a/kubernetes/robot
+++ b/kubernetes/robot
@@ -1 +1 @@
-Subproject commit da28d1cdc573a726d3fc8a19638ebc8b3679295f
+Subproject commit 3b9adc67e6ae2a65480d80dc50cee88b674604a3