Updated git submodules

Project: netvirt master ef21a07085cf53881de107bbfa56a5a075cc7ba7

Untangle bad class design: OpenFlow13Provider does not use DataBroker

It's generally best practice to not "reach over" through other services
to obtain injected services, but just let each class have (final) fields
with all of its dependant services.

In this particular case, the OpenFlow13Provider does not need to have a
DataBroker, so it's best to keep this simpler.  This makes writing unit
tests for OpenFlow13Provider more clear; for example, in
https://git.opendaylight.org/gerrit/#/c/54376/.

Change-Id: I3924275c246ffca2da259a2f696a51282eab486a
Signed-off-by: Michael Vorburger <vorburger@redhat.com>

diff --git a/docs/submodules/netvirt b/docs/submodules/netvirt
index 2184edb91f9d1e9c6537a57f1530a0ac0ea37329..ef21a07085cf53881de107bbfa56a5a075cc7ba7 160000 (submodule)
--- a/docs/submodules/netvirt
+++ b/docs/submodules/netvirt
@@ -1 +1 @@
-Subproject commit 2184edb91f9d1e9c6537a57f1530a0ac0ea37329
+Subproject commit ef21a07085cf53881de107bbfa56a5a075cc7ba7