Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Fix pylint errors about refstack

    JIRA: FUNCTEST-907

    Change-Id: Ib08a88523c700d35894b9b89b7585425a02065c3
    Signed-off-by: Linda Wang <wangwulin@huawei.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 8e416ae..03c3f4c 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 8e416aee220bf6959e2e21f18a5ebfec1421858b
+Subproject commit 03c3f4c2bd1635383cb64168b52e4d8540056942