Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 402d43093b4ebd2199a569406a4b5800424c5983
  - Merge "fix functest-xtesting -> xtesting"
  - fix functest-xtesting -> xtesting

    Change-Id: Icc8f13b725f70531cb98d0c90dacc0229567f9d6
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 6c0a9b1..402d430 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 6c0a9b1971d91d36771a43f2b87d85656a59a7fa
+Subproject commit 402d43093b4ebd2199a569406a4b5800424c5983