Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Save Euphrates results in repo

    Change-Id: I6e7fb1d4b81572a151f47fc071a1ae27f1b41e97
    Signed-off-by: Morgan Richomme <morgan.richomme@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index ae660ff..39f856f 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit ae660ffa3285307edd41898cb2eaba22864d4f2d
+Subproject commit 39f856fd8304cdb056beb61d85c81a0613230e40