Updated git submodules

Project: netvirt master 8bbc409e5d4bd1fdf29ad51fa2ab4d45c94e9c6b

Bug 7126 - legacy netvirt: null pointer exception NeutronSubnetInterface.fromMd

With openstack CI, legacy netvirt spits the following null pointer
exception.

> 2016-11-08 09:15:31,792 | ERROR | ntDispatcherImpl | TenantNetworkManagerImpl         | 336 - org.opendaylight.netvirt.openstack.net-virt - 1.4.0.SNAPSHOT | getDHCPServerPort:getDHCPServerPort failed due to
> java.lang.NullPointerException
>         at org.opendaylight.netvirt.openstack.netvirt.translator.crud.impl.NeutronSubnetInterface.fromMd(NeutronSubnetInterface.java:178)
>         at org.opendaylight.netvirt.openstack.netvirt.translator.crud.impl.NeutronSubnetInterface.getSubnet(NeutronSubnetInterface.java:84)
>         at org.opendaylight.netvirt.openstack.netvirt.impl.SecurityServicesImpl.getDhcpServerPort(SecurityServicesImpl.java:164)
>         at org.opendaylight.netvirt.openstack.netvirt.providers.openflow13.OF13Provider.programLocalSecurityGroupRules(OF13Provider.java:1056)
>         at org.opendaylight.netvirt.openstack.netvirt.providers.openflow13.OF13Provider.programLocalRules(OF13Provider.java:814)
>         at org.opendaylight.netvirt.openstack.netvirt.providers.openflow13.OF13Provider.handleInterfaceUpdate(OF13Provider.java:1194)
>         at org.opendaylight.netvirt.openstack.netvirt.SouthboundHandler.handleInterfaceUpdate(SouthboundHandler.java:101)[336:org.opendaylight.netvirt.openstack.net-virt:1.4.0.SNAPSHOT]
>         at org.opendaylight.netvirt.openstack.netvirt.SouthboundHandler.processPortUpdate(SouthboundHandler.java:343)[336:org.opendaylight.netvirt.openstack.net-virt:1.4.0.SNAPSHOT]
>         at org.opendaylight.netvirt.openstack.netvirt.SouthboundHandler.processPortEvent(SouthboundHandler.java:329)[336:org.opendaylight.netvirt.openstack.net-virt:1.4.0.SNAPSHOT]
>         at org.opendaylight.netvirt.openstack.netvirt.SouthboundHandler.processEvent(SouthboundHandler.java:274)[336:org.opendaylight.netvirt.openstack.net-virt:1.4.0.SNAPSHOT]
>         at org.opendaylight.netvirt.openstack.netvirt.impl.EventDispatcherImpl.dispatchEvent(EventDispatcherImpl.java:96)[336:org.opendaylight.netvirt.openstack.net-virt:1.4.0.SNAPSHOT]
>         at org.opendaylight.netvirt.openstack.netvirt.impl.EventDispatcherImpl.lambda$start$0(EventDispatcherImpl.java:58)[336:org.opendaylight.netvirt.openstack.net-virt:1.4.0.SNAPSHOT]
>         at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)[:1.8.0_91]
>         at java.util.concurrent.FutureTask.run(FutureTask.java:266)[:1.8.0_91]
>         at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)[:1.8.0_91]
>         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)[:1.8.0_91]
>         at java.lang.Thread.run(Thread.java:745)[:1.8.0_91]

Change-Id: Id02d8e4f76c2394b6e765e7dfb92e66693051769
Signed-off-by: Isaku Yamahata <isaku.yamahata@intel.com>

diff --git a/docs/submodules/netvirt b/docs/submodules/netvirt
index 41b7a31a44e6b10fc16fb0a758003fad75b13640..8bbc409e5d4bd1fdf29ad51fa2ab4d45c94e9c6b 160000 (submodule)
--- a/docs/submodules/netvirt
+++ b/docs/submodules/netvirt
@@ -1 +1 @@
-Subproject commit 41b7a31a44e6b10fc16fb0a758003fad75b13640
+Subproject commit 8bbc409e5d4bd1fdf29ad51fa2ab4d45c94e9c6b