Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 734ce86924013edc21e9a845555a59feacf2c117
  - Add Jerma in jjb/releng/releng-release-jobs.yaml

    Change-Id: Ie137184dd58334bb37195a709b6d9a3c6fb4b845
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 28359b1..734ce86 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 28359b18dde956af4ff57b9b0e469e484ca280f7
+Subproject commit 734ce86924013edc21e9a845555a59feacf2c117