Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Use logger instead of printing in console"
  - Use logger instead of printing in console

    It modifies pytest_suite_runner.py to dump unit test results in
    functest.log via logging.

    Change-Id: Ic4e7567c5e52e00ad0e485ccb070029b135041b2
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 6a655e8..dd9fb78 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 6a655e830dd891d0b5afec601b4fb2461b1fad42
+Subproject commit dd9fb78e0553c35eb60e76b2979dac803f818ecb