Update git submodules

* Update docs/submodules/doctor from branch 'master'
  - Merge "Added more upstream work"
  - Added more upstream work

    Change-Id: Ifc5bf04272add8d1d8db2b128bdc7dbae24ba5e8
    Signed-off-by: Bertrand Souville <souville@docomolab-euro.com>

diff --git a/docs/submodules/doctor b/docs/submodules/doctor
index db6684c..867ea30 160000 (submodule)
--- a/docs/submodules/doctor
+++ b/docs/submodules/doctor
@@ -1 +1 @@
-Subproject commit db6684c6cbdec3d41d0e555793a275879bbb26bc
+Subproject commit 867ea30e86b94546a9b2cd769283bd4f62b1c948