Update git submodules

* Update docs/submodules/functest from branch 'stable/euphrates'
  - Fix the format issue of documentation

    Also update the structure of functest code.

    Change-Id: Id3fa012d6c3204a0a8d7e6e4ba3159c52b68c6f5
    Signed-off-by: Linda Wang <wangwulin@huawei.com>
    (cherry picked from commit 79140281403a83ecfededbd1b58bf668bd4d1901)

diff --git a/docs/submodules/functest b/docs/submodules/functest
index d2c3545..bee66e3 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit d2c354571a41c48a6fcb5cc785be6c3813609ad2
+Subproject commit bee66e3dbb7116eab1f5b7485eff9d0e291089d6