Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Execute feature command by subprocess directly"
  - Execute feature command by subprocess directly

    Change-Id: I77e86af4e96310c6520d743e4d16c9a7b2e9adf5
    Signed-off-by: Linda Wang <wangwulin@huawei.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index b58febe..ba6bd3e 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit b58febe005c60bbd54fd069eecac707072fcdeeb
+Subproject commit ba6bd3ef221dc56a1ea2f74a1bc4d32d6fa21465