Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Fix Functest Developer Guide

    It allows building this documentation via tox.
    rst files are now checked via doc8.

    Change-Id: I4f45dc2b6657466b05e7ceec60a751656552584e
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 3756ff6..1f0a008 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 3756ff6fbd17269fd9d2a585d3d0ef4bea6f6f9e
+Subproject commit 1f0a0085222337691e8209851cac4ef57333a064