Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "support fuel&daisy for doctor in functest"
  - support fuel&daisy for doctor in functest

    Change-Id: Ibfce5a21517e52bb5b2ea7a2d34bd22037e6964e
    Signed-off-by: dongwenjuan <dong.wenjuan@zte.com.cn>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 99b72c3..8ff4c9d 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 99b72c34e92c567a47ebc3b977c7aaa290fef6de
+Subproject commit 8ff4c9da8e0835cfa2c14edfa2ad8f3d53cbb725