Update git submodules

* Update docs/submodules/functest from branch 'stable/euphrates'
  - Update Docker hooks

    It takes euphrates into account in Docker tag name.

    Change-Id: Id455152655c8174b7cab9780c27d923f33173f28
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 57b738e..124a658 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 57b738ef5c47e790c1fe25aa6c1d876ced47f936
+Subproject commit 124a658f45154235af466d70cb8364ef4ab79a36