Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - [ovs/dpdk] Configure vxlan for baremetal scenario

    * switch ovs/dpdk scenario from vlan to vxlan mode
    * force br-ex interface to mitigate race with incorrect state
    * remove dpdk packages list (already in upstream)

    Change-Id: Ib827cef2d67879fd2a86d286ca2118b22493274d
    Signed-off-by: Michael Polenchuk <mpolenchuk@mirantis.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 8b48875..2bd6a0e 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 8b48875e30afa4c60f27310df548a18c18e9af60
+Subproject commit 2bd6a0ed390285ec8f17cc8c71a9147485ca860b