Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - [virtual/odl] Simplify network scheme on computes

    Change-Id: Ifb874aba38b2fa36fde05184bcdd74870257bec1
    Signed-off-by: Michael Polenchuk <mpolenchuk@mirantis.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 7c6c58c..e1f66f6 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 7c6c58cc10c54b6d642d243ce7c63fb0a4e88e7c
+Subproject commit e1f66f65ff0a7e401a0b4b5275f915bbaabea128