Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 569c74f86e0148a1dfef6709856d9609c3f068de
  - Merge "Dump all logs as last Xtesting step"
  - Dump all logs as last Xtesting step

    Change-Id: I6a1353446f34a97307aeda322893006c833018b2
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 554c571..569c74f 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 554c5718626bd1bceb26e7036a6463bd85576f64
+Subproject commit 569c74f86e0148a1dfef6709856d9609c3f068de