Update git submodules

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

    Change-Id: I7a880c0a011d6f5f4a7e2d8c8309871b1c290235
    Signed-off-by: Michael Polenchuk <mpolenchuk@mirantis.com>
    (cherry picked from commit d97b19bdde59600f588b1e6aca52a6d1962f8778)

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 7056a8c..e6f50c1 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 7056a8c5379b34bab3dd2b7cf8ca5c91656cb629
+Subproject commit e6f50c169dc1f4c0058fe5c058eacd871102bf1b