Update git submodules

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

    Change-Id: I71539412285c8f7865890880fdfc8c5268156f68
    Signed-off-by: Bertrand Souville <souville@docomolab-euro.com>

diff --git a/docs/submodules/doctor b/docs/submodules/doctor
index 867ea30..697f0cc 160000 (submodule)
--- a/docs/submodules/doctor
+++ b/docs/submodules/doctor
@@ -1 +1 @@
-Subproject commit 867ea30e86b94546a9b2cd769283bd4f62b1c948
+Subproject commit 697f0cc6ed39b139a2ef022b8e5ef8ef80bbff19