Update git submodules

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

    Change-Id: I6e7fb1d4b81572a151f47fc071a1ae27f1b41e97
    Signed-off-by: Morgan Richomme <morgan.richomme@orange.com>
    (cherry picked from commit 39f856fd8304cdb056beb61d85c81a0613230e40)

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 7935672..3ed55d5 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 79356722e6a015e2486c1bd59c6729ebd37aaa87
+Subproject commit 3ed55d54d97cfd140d7d9d93de59dbb5dccad915