Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 2ad3aefc27a60b40acfbcbd248a208bcc58422fe
  - Publish new Functest K8s builds

    Change-Id: Ifca7bbc9eb74c51aaf217580aaa3e904e6af6c39
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 876cd53..2ad3aef 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 876cd53e23632d587dc1229fa29ade3352ccae7c
+Subproject commit 2ad3aefc27a60b40acfbcbd248a208bcc58422fe