Update git submodules

* Update docs/submodules/releng from branch 'master'
  to e9e775c4de6be47dd51b63f5a81e7aa365a9fea5
  - Use same slave for K8s Jerma and master

    Kubernetes master tests are verified vs Kubernetes 1.16.1 (Jerma).

    Change-Id: Ib6f54f5eab55354d0df8c4b6733d43e001257537
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index f7df2d4..e9e775c 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit f7df2d437f5b4b15d3c374da4d24b137cc672916
+Subproject commit e9e775c4de6be47dd51b63f5a81e7aa365a9fea5