Update git submodules

* Update docs/submodules/releng from branch 'master'
  to efa227e45ef2d4c4344ec0bf0449eefc1e9dcaeb
  - Build functest-smoke-cntt

    It completes the patch "Publish functest-cntt-smoke" [1]

    [1] https://gerrit.opnfv.org/gerrit/c/functest/+/68668

    Change-Id: I932c9f087d42ad7f2a7fb2d31f3baefbb9187817
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index b03c8d2..efa227e 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit b03c8d2ec246a431b76cea2760fb60483db978ec
+Subproject commit efa227e45ef2d4c4344ec0bf0449eefc1e9dcaeb