Update git submodules

* Update docs/submodules/releng from branch 'master'
  to f94aff89dd75905794969e882d4ffd71752fc206
  - Add step property test

    Change-Id: I41c0f388830eea6c7f24b3d2a861d6cce6ce79f2
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index b99f9fa..f94aff8 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit b99f9fa560c8ce8a90cd3f4f06669380a19a2ffd
+Subproject commit f94aff89dd75905794969e882d4ffd71752fc206