Update git submodules

* Update docs/submodules/doctor from branch 'stable/gambia'
  - Support Apex with services in containers

    Upstream apex now works in containers, so if used, it needs to be supported

    JIRA: DOCTOR-130

    Change-Id: I3d73a1699e4fee53b001f043f55d0eeefa7bfb7b
    Signed-off-by: Tomi Juvonen <tomi.juvonen@nokia.com>
    (cherry picked from commit a6575910a137f8932e294f66c9da3194ad937691)

diff --git a/docs/submodules/doctor b/docs/submodules/doctor
index a7517dd..9e012b8 160000 (submodule)
--- a/docs/submodules/doctor
+++ b/docs/submodules/doctor
@@ -1 +1 @@
-Subproject commit a7517dda9ede8bedadcbcedf7a46187268977d3a
+Subproject commit 9e012b87f560fe13f8cc63a21321a4f0c2efa1b0