Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - [odl] Remove unused connecter/port from proxy

    Change-Id: I7a880c0a011d6f5f4a7e2d8c8309871b1c290235
    Signed-off-by: Michael Polenchuk <mpolenchuk@mirantis.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index b9da440..d97b19b 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit b9da44077a589ac8debf12d86d8aefe4be5dc84e
+Subproject commit d97b19bdde59600f588b1e6aca52a6d1962f8778