Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 13b5c563594ab9fad446a4e5c6d6357dfb6fd82f
  - Multiply kubernetes configs

    It allows testing multiple kubernetes from lf-pod1.

    Change-Id: I4a8054acabc3c2982e64733ff789a70c171f6ac1
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index dbf849c..13b5c56 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit dbf849cd0df14206d05743272d8520fa7284ccd9
+Subproject commit 13b5c563594ab9fad446a4e5c6d6357dfb6fd82f