Update git submodules

* Update docs/submodules/functest from branch 'stable/euphrates'
  - Take into account a feedback from the meeting

    Change-Id: Ia221d08003588aae045604a18ce1ecc833f0e34e
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 0753004..edbc21a 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 0753004acc5732c228114e4c9b9a8de881dbdada
+Subproject commit edbc21af0b4879ccba376b07ae4909cf5bc12853