Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Fully cover pytest_suite_runner.py"
  - Fully cover pytest_suite_runner.py

    Change-Id: I766afb1d5c6ef53a5b551539662ee363ae8eadee
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 5509d6b..6f70bd1 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 5509d6b06cc77ecd913761b534db3951eb9777bd
+Subproject commit 6f70bd17b238e3c931f5d575e4b8eb625dbca91d