Update git submodules

* Update docs/submodules/doctor from branch 'master'
  - use keystone v3 API

    Change-Id: Ia642279a99ad9bf014764337c8a5170e3c98e2f2
    Signed-off-by: dongwenjuan <dong.wenjuan@zte.com.cn>

diff --git a/docs/submodules/doctor b/docs/submodules/doctor
index 9e36d91..bdbd229 160000 (submodule)
--- a/docs/submodules/doctor
+++ b/docs/submodules/doctor
@@ -1 +1 @@
-Subproject commit 9e36d918fef054b8d23692c0ec8c25d7b0640c07
+Subproject commit bdbd22904733af311225a3315555bb39ea12ed55