throws NullPointerException while creating a network without br-int interface.

2016-05-30 19:05:30,365 | ERROR | ntDispatcherImpl | TenantNetworkManagerImpl | 283 - org.opendaylight.netvirt.openstack.net-virt - 1.2.4.SNAPSHOT | Exception during handlingNeutron network delete
java.lang.NullPointerException
at org.opendaylight.netvirt.openstack.netvirt.impl.SouthboundImpl.extractTerminationPointAugmentations(SouthboundImpl.java:461)[283:org.opendaylight.netvirt.openstack.net-virt:1.2.4.SNAPSHOT]
at org.opendaylight.netvirt.openstack.netvirt.impl.SouthboundImpl.getTerminationPointsOfBridge(SouthboundImpl.java:416)[283:org.opendaylight.netvirt.openstack.net-virt:1.2.4.SNAPSHOT]
at org.opendaylight.netvirt.openstack.netvirt.impl.SecurityServicesImpl.getNode(SecurityServicesImpl.java:587)[283:org.opendaylight.netvirt.openstack.net-virt:1.2.4.SNAPSHOT]

How to reproduce:
1. ODL Controller with control and compute node is UP.
2. Delete br-int interface in control node.
3. Create a network.

Cause of the bug is trying to read the ovsdb ports when node is null for br-int.