Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Switch Functest k8s docker builds to multijobs"
  - Switch Functest k8s docker builds to multijobs

    The former Functest kubernetes container will be split due to new
    OPNFV features (clover, stor4vnf).

    {image} is bypassed to first check vs the current docker repository.

    Change-Id: I29998b21ec6992463b9ca77b38e51b928a9da69a
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 3ec4f93..b74272c 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 3ec4f930f4ab7910ce730b4648f2a7403711cdcd
+Subproject commit b74272cbaab1537b9b1facaeb74c1e548bdb32d6