Update git submodules

* Update docs/submodules/releng from branch 'master'
  to f4cd94ed265356429d861432ea79b6e8e31f08c3
  - Reduce filtering in Functest gates

    It allows verifying Leguer (lf-virtual9 is blocked by a zombie)

    Change-Id: I9f3ed6a9e1499fb3a9dd844f233275207b97e785
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 9e5b53e..f4cd94e 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 9e5b53e2ea007ab41cd972f904e9a52f13bd543e
+Subproject commit f4cd94ed265356429d861432ea79b6e8e31f08c3