Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 42973e51bdd402b04c4d6a38d2630785925ac0fe
  - Fix call orders

    Change-Id: Ia4e2bcc6891a09e64aa3dc137fc5549ca8b84aa9
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 3a5d08d..42973e5 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 3a5d08db414be94c0917891027a655912cee4045
+Subproject commit 42973e51bdd402b04c4d6a38d2630785925ac0fe