Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 37f4c730fb99b2241db6093e7d5076c8561f11e1
  - Enable Functest jobs

    Change-Id: Idd57c72ecbd499c18d91a42e8efa036e591de89e
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index c9fe57c..37f4c73 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit c9fe57ceabe86831ec21f417ca2e7461d4586455
+Subproject commit 37f4c730fb99b2241db6093e7d5076c8561f11e1