Update git submodules

* Update docs/submodules/functest from branch 'stable/fraser'
  - Mock os.makedirs() in test_odl.py

    os.makedirs() is called before calling robot.run.

    Change-Id: Id651428343510683cd616d8101d22a73ccbf3dad
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
    (cherry picked from commit 383ed86699816f633f007c515338d0fa022bf4fc)

diff --git a/docs/submodules/functest b/docs/submodules/functest
index e13e87d..594a3f3 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit e13e87d9d064c2427208104d3dacc9b8aee95b6e
+Subproject commit 594a3f389add82469ef66462cdbd30347945f6ee