Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Fix the format issue of documentation"
  - Fix the format issue of documentation

    Also update the structure of functest code.

    Change-Id: Id3fa012d6c3204a0a8d7e6e4ba3159c52b68c6f5
    Signed-off-by: Linda Wang <wangwulin@huawei.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index a60f595..b020adb 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit a60f59504444da2018da2e599a1ae67e2ff11945
+Subproject commit b020adb0c47f5d85b5cc1b3b3927e689698499ff