Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Clean Functest containers even if failure"
  - Clean Functest containers even if failure

    It creates an additional multijob to ensure all containers are removed.
    It also publishes logs via gsutil.

    Change-Id: I45bd8aec3569e3257b94ea978c5bf2fd703649be
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 16e9907..234a3b4 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 16e9907a18c28aeffedc4dd047b0727dd0c1066e
+Subproject commit 234a3b4d76a61846caab74e042139e4dc2edc2a4