Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Fix pylint warnings in decorators.py"
  - Fix pylint warnings in decorators.py

    Change-Id: Ie6c53feb97053248c909d641753b44b5f51c8719
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 7ebf2d7..b4f1fd6 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 7ebf2d7f41d8935012388f95ea5525bd9d39fdc0
+Subproject commit b4f1fd63dea0b67654be7b3c0239fbada1bfcafa