Update git submodules

* Update docs/submodules/doctor from branch 'stable/fraser'
  - Merge "Updated Doctor user configuration doc" into stable/fraser
  - Updated Doctor user configuration doc

    Change-Id: I71539412285c8f7865890880fdfc8c5268156f68
    Signed-off-by: Bertrand Souville <souville@docomolab-euro.com>
    (cherry picked from commit eee0314ac794d5e2b1ef8739afb12a89c3b42cc4)

diff --git a/docs/submodules/doctor b/docs/submodules/doctor
index 5f539b4..2bc7bbf 160000 (submodule)
--- a/docs/submodules/doctor
+++ b/docs/submodules/doctor
@@ -1 +1 @@
-Subproject commit 5f539b460279ff0df92119d5d9cb85740e4ce7f7
+Subproject commit 2bc7bbf41ff1c843ee40fa8a6bf8b1513456544b