Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Generate functest.yaml to verify OS master

    Change-Id: If39c18e0b9f5578b0e42b6e57cec10474d0fec5f
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 8b84ec8..74d117b 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 8b84ec83ce8725ad94a4f16c1e5d61f0558711d2
+Subproject commit 74d117bf8fac8d2059f04d07d8b2c58c62d7f2e1