Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - [noha] Bind cinder volume I/O on mgmt network

    iSCSI read/write ops are acting up on interface/network (pxe/admin
    is chosen by default) with jumbo frames enabled, so configure iSCSI
    daemon to listen on management network.

    Change-Id: I3b643b151ba0abffe5cfe2ba7417010020eb07ae
    Signed-off-by: Michael Polenchuk <mpolenchuk@mirantis.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index db287e0..cffa328 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit db287e06201561d9fc5199bda2815bfabf1840f5
+Subproject commit cffa328916188ca5270d7d29869d34579e1566c6