Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Add docstings in feature.py

    It also modifies the testcase module docstring.
    Now features.py is rated 10/10 by pylint.

    Change-Id: I83f2ac385b2a713d116c1ae4b49ba9cc9b26a83c
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index d56468b..284aeae 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit d56468b230c53f8fd9327cd73e0d270d3d73c3d9
+Subproject commit 284aeae6890c455c43ea8e841db9f8d1f3cf46e2