Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Catch os.makedirs() exceptions in tempest.py

    It can raise an error exception if the leaf directory already exists or
    cannot be created [1].

    [1] https://docs.python.org/2/library/os.html

    JIRA: FUNCTEST-804

    Change-Id: Ie410bccf1bb2dfd36df6e918c152ecf94844b5d7
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 37c98a6..d1398b9 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 37c98a6fa101be2b32129dd5d71ad750f5245b88
+Subproject commit d1398b95c40dacdeb1bf03cbfff77a458ccb8235