Update git submodules

* Update docs/submodules/releng from branch 'master'
  to b18589bcc4939f590502710d2d77ceff3a4aa394
  - Replace jenkins_2multijobs by macro in testing

    Change-Id: Icab41580a7dc57e297eb65a818c26b5a4b6f6fb1
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 255ed08..b18589b 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 255ed0857d2d32727e26c95fdad966b34fe105eb
+Subproject commit b18589bcc4939f590502710d2d77ceff3a4aa394