Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 16efea266ab609265a2e84a351ad1178f13aa690
  - Prepare Functest Leguer project jobs

    OpenStack Victoria is being released [1].

    [1] https://releases.openstack.org/victoria/index.html

    Change-Id: I32eebf88b71bc8d39e656b69a7a32922b84e93bb
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index b7923a8..16efea2 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit b7923a8d191919f9ce38e591d9d83f594804c695
+Subproject commit 16efea266ab609265a2e84a351ad1178f13aa690