Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - Make virtual cluster as noha w/ one controller

    * remove glusterfs from cluster
    * increase amount of ram on controller
    * bring in one more compute node

    Change-Id: I04ccd4cdaf65bb860d6d3b9c012e035f598e44d5
    Signed-off-by: Michael Polenchuk <mpolenchuk@mirantis.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 8e0b5d2..c9c86b8 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 8e0b5d2550241d44a9d91bbbb040e3446656a02f
+Subproject commit c9c86b875735b7f21a90e73f16b58fa13c01b419