Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Exclude functest-components (master)

    Change-Id: Id5df1a67b77711b172e8943c59866c8c3853e87f
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index b871786..4bf5f31 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit b8717867d835f58de44140fd33aec75f9dfb4603
+Subproject commit 4bf5f31702c7e499755e56efe90a18c9b9828461