Update git submodules

* Update docs/submodules/doctor from branch 'master'
  - add framework and tox

    JIRA: DOCTOR-93

    Change-Id: Ife3255c4fe2d170c5d1b8354aaab24d5b1e3bc64
    Signed-off-by: dongwenjuan <dong.wenjuan@zte.com.cn>

diff --git a/docs/submodules/doctor b/docs/submodules/doctor
index 263682e..e3f9edb 160000 (submodule)
--- a/docs/submodules/doctor
+++ b/docs/submodules/doctor
@@ -1 +1 @@
-Subproject commit 263682e54a4d75d1f33c76735ffa2fe9debe0161
+Subproject commit e3f9edb5064e280056addd6fc47535d3ee1a2435