Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Refactor TempestCommon to simplify subclasses"
  - Refactor TempestCommon to simplify subclasses

    Change-Id: I8d265b6939861fd9d02a3d0f31aef53b9bfcb035
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 3b5c306..370eee3 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 3b5c3061ea9d03d124fa42d2e4f00cf26b06c535
+Subproject commit 370eee3b9b1b20057191aa614ddfda31f8656e8e