Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Fix pylint errors in test_refstack_client"
  - Fix pylint errors in test_refstack_client

    Change-Id: Ia53ac75c913f351412180b9b71a56b4c5fbbe4a5
    Signed-off-by: Linda Wang <wangwulin@huawei.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 65e832c..3241868 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 65e832cc579b86fd82864612bd35b387e3ada5e1
+Subproject commit 3241868d79a4b9f951e920bcfcdbd877c1235cb5