Update git submodules

* Update kubernetes/robot from branch 'frankfurt'
  to 36eee9317915ad1728421a5abeaa84fff239911c
  - bump testsuite 1.6.3 for frankfurt RC2

    the delta with 1.6.2 includes minor fixes for
    - 5gbulkpm
    - pnf-registrate

    Please note that these changes are already taken into account in CI
    as xtesting dockers are rebuilt everyday but it is cleaner to execute
    the use cases

    Issue-ID: INT-1553

    Signed-off-by: mrichomme <morgan.richomme@orange.com>
    Change-Id: Ibd41c65d4190421e7c790f7e1f8a754923803757
    Signed-off-by: mrichomme <morgan.richomme@orange.com>
    (cherry picked from commit 7ee95b4c8f667dd0506499db17688473309cd91e)

diff --git a/kubernetes/robot b/kubernetes/robot
index d80164a..36eee93 160000 (submodule)
--- a/kubernetes/robot
+++ b/kubernetes/robot
@@ -1 +1 @@
-Subproject commit d80164a8b6d73762dcfd8d14262811b7ff52caf3
+Subproject commit 36eee9317915ad1728421a5abeaa84fff239911c