Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Avoid duplicating get_parameter_from_yaml"
  - Avoid duplicating get_parameter_from_yaml

    It switches to this helper which was locally copied.

    Change-Id: Iaa30d83e8c0e2d4472f4ef8fe1da4943e424ebb3
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 3a042e0..18c016a 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 3a042e00c533dae47014842ed345da6b321f5eb9
+Subproject commit 18c016a2eaf65fec880a04bcc354f52e9cdb4417