Adding new subnet to lisp service mapping service failed

While running integration test on the ovsdb netvirt piece, we hit this NPE:

2015-07-07 20:35:39,176 | ERROR | qtp726956385-571 | LispNeutronService | 333 - org.opendaylight.lispflowmapping.mappingservice.neutron - 1.3.0.SNAPSHOT | Adding new subnet to lisp service mapping service failed. Subnet : NeutronSubnet [subnetUUID=00289199-e288-464a-ab2f-837ca67101a7, networkUUID=7da709ff-397f-4778-a0e8-994811272fdb, name=subext1, ipVersion=4, cidr=192.168.111.0/24, gatewayIP=192.168.111.254, dnsNameservers=[], allocationPools=[NeutronSubnetIPAllocationPool [start=192.168.111.21, end=192.168.111.40]], hostRoutes=[], enableDHCP=false, tenantID=cde2563ead464ffa97963c59e002c0cf, myPorts=[], gatewayIPAssigned=false, ipv6AddressMode=null, ipv6RaMode=null]Error: java.lang.NullPointerException

[1] contains the complete karaf log
[2] presents the jenkins job that triggered this issue
[3] robot test cases that are run against ovsdb netvirt

Note: this happens on master branch only, stable/lithium doesn't have this issue.

[1] https://jenkins.opendaylight.org/releng/view/ovsdb/job/ovsdb-csit-1node-cds-netvirt-all-master/68/artifact/karaf.log
[2] https://jenkins.opendaylight.org/releng/view/ovsdb/job/ovsdb-csit-1node-cds-netvirt-all-master/68/
[3] https://git.opendaylight.org/gerrit/gitweb?p=integration.git;a=tree;f=test/csit/suites/ovsdb/Openstack_Neutron;h=10d604638defc2928bc5b8d73afb0dda46b726be;hb=HEAD