Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - Merge "[patch] OVS bridges should not use 'auto'"
  - [patch] OVS bridges should not use 'auto'

    Change-Id: I0db7b9ee5af77f9e2d580c4ace9fa7d7f17c8d85
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index bc70493..3dbd313 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit bc70493008a9194ec215214c97175d870eadcbf8
+Subproject commit 3dbd313cc111455f8cf88d0d072ec8a2f3c6f705