Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - [ovs/dpdk] Set bridge datapath_type to netdev

    This prevents neutron ovs agent to re-create existing bridge which
    might cause unpredictable/faulty state of network interfaces.

    Change-Id: I289365e1dea7d178b5b72eb506f5c711f6d60199
    Signed-off-by: Michael Polenchuk <mpolenchuk@mirantis.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 9dfa19d..f74f7ba 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 9dfa19de4ae2962152c866657c9a2f60f96a1795
+Subproject commit f74f7bac151f69ae0b50f28e68805a5d8580736e