Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Fix upper-constraints.txt url

    Change-Id: I44f7b476d56bcd7cdac4ba0e5c85717bd41f7e45
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index d22a9e5..1696e20 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit d22a9e58bbf4430c16f9f62bdaff2a6dc335205e
+Subproject commit 1696e20a069055b7afc7c0e3583dae5cf3ac9969