Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - Clean up upstreamed patches

    Change-Id: Icee56da3720f0926e42390965581639f6a344b77
    Signed-off-by: Michael Polenchuk <mpolenchuk@mirantis.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 8387dd4..7703538 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 8387dd44747d3e17269289c096edaecdaaee573a
+Subproject commit 77035382d218b650b23dc1f383739c5a939072a9