Update git submodules

* Update docs/submodules/functest from branch 'stable/fraser'
  - Merge "Update userguide" into stable/fraser
  - Update userguide

    Change-Id: I2725ffcb4101496c2019d22215b1585fa3444775
    Signed-off-by: Linda Wang <wangwulin@huawei.com>
    (cherry picked from commit 29874d5585b9f726e71feb1697411152aa851434)

diff --git a/docs/submodules/functest b/docs/submodules/functest
index fbd812f..66124d8 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit fbd812fc1a977b91c5c299cf46b97c46628edd72
+Subproject commit 66124d83c2ca18430b2f9d06613536d145889362