Update git submodules

* Update docs/submodules/doctor from branch 'master'
  - fix the bug for consumer don't receive the notification

    There is no 'sudo' command in functest container, so the stunnel is setup failed.

    Change-Id: I9e317c0643a370fb5b35d90363b0ff734a77c040
    Signed-off-by: dongwenjuan <dong.wenjuan@zte.com.cn>

diff --git a/docs/submodules/doctor b/docs/submodules/doctor
index ff43740..aa16cb3 160000 (submodule)
--- a/docs/submodules/doctor
+++ b/docs/submodules/doctor
@@ -1 +1 @@
-Subproject commit ff43740199fc14ad01b05ed0d626f51f81eb82f2
+Subproject commit aa16cb3987bad7abfb8743cb205980a50d5f12fe