Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Use decorators for mock patching"
  - Use decorators for mock patching

    Instead of using the `with` clause, mock patching is prepended to each
    testing method as a decorator.

    Change-Id: Ieb962d6fd0b9a6cdc649c44e39f69b543426dce9
    Signed-off-by: Martin Kulhavy <martin.kulhavy@nokia.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 2812b73..78d54dc 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 2812b73ba29d321753d0e7faf28d8b8475cc6de4
+Subproject commit 78d54dcc2d1131b791c0a111595844ef4506823d