Update git submodules

* Update docs/submodules/fuel from branch 'stable/euphrates'
  - [ovs/dpdk] Force up the float-to-ex link only

    Force up br-ex to br-floating link instead of all networking
    restart to avoid issues with existing interface routes.

    Change-Id: I6b8204db6767e1fde964eb1913f885ecb06d0c28
    Signed-off-by: Michael Polenchuk <mpolenchuk@mirantis.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 48055f4..0ebc4e0 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 48055f477ec91491bce13230b652939f1941dbb9
+Subproject commit 0ebc4e085cef8e61f4aa03c164f2e2966986c9b0