VTN Manager failed to create network in devstack(stable/kilo)

Reproduce the issue:

i)git clone https://git.openstack.org/openstack-dev/devstack;
ii)git checkout stable/kilo
iii)Create local.conf file and add this line "enable_plugin networking-odl https://github.com/flavio-fernandes/networking-odl lithiumkilo”.
iv)Start VTN Manager and install this feature "feature:install odl-vtn-manager-neutron".
v)Start devstack using "./stack.sh" script. Network create fails with the below error message in VTN MAnager logs,

VBridge[name=63dac4734e50e84b0420fd5fbc8ade7,desc=private,ageInterval=600,faults=0,state=UNKNOWN]
2015-08-19 15:59:22,704 | ERROR | p1058729785-3412 | ContainerResponse | 218 - com.sun.jersey.jersey-server - 1.17.0 | Mapped exception to response: 503 (Service Unavailable)
org.opendaylight.neutron.northbound.api.ServiceUnavailableException
at org.opendaylight.neutron.northbound.api.NeutronSecurityGroupsNorthbound.createSecurityGroups(NeutronSecurityGroupsNorthbound.java:196)[246:org.opendaylight.neutron.northbound-api:0.5.0.Lithium]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)[:1.7.0_79]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)[:1.7.0_79]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)[:1.7.0_79]
at java.lang.reflect.Method.invoke(Method.java:606)[:1.7.0_79]
at com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60)[218:com.sun.jersey.jersey-server:1.17.0]
at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$ResponseOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:205)[218:com.sun.jersey.jersey-server:1.17.0]
at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)[218:com.sun.jersey.jersey-server:1.17.0]