Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Move source_credentials() into run_tests.py"
  - Move source_credentials() into run_tests.py

    It's also renamed source_envfile().

    Change-Id: I0e7c38c2def125961f86dc2bc9a63cfb6ad87c03
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 57539ef..9fd0361 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 57539ef2f4633db2a31a27bad5c622f5aaef1ea7
+Subproject commit 9fd0361c6361b061eae3851e61f9d16edffc6de7