Comment 2 for bug 1713407

This crash is observed while attaching the policy to IP Fabric VN when VirtualNetworkPolicyType is None.

> /contrail-test/common/gw_less_fwd/base.py(382)setup_policy()
-> ip_fabric_vn_fq_name_str = "default-domain:default-project:ip-fabric"
(Pdb) n
> /contrail-test/common/gw_less_fwd/base.py(383)setup_policy()
-> ip_fabric_vn_obj = self.vnc_h.virtual_network_read(fq_name_str=ip_fabric_vn_fq_name_str)
(Pdb)
> /contrail-test/common/gw_less_fwd/base.py(384)setup_policy()
-> policy_obj = self.vnc_h.network_policy_read(fq_name=policy_fixture.policy_fq_name)
(Pdb)
> /contrail-test/common/gw_less_fwd/base.py(385)setup_policy()
-> ip_fabric_vn_obj.add_network_policy(policy_obj, None) <===============
(Pdb)
> /contrail-test/common/gw_less_fwd/base.py(386)setup_policy()
-> self.vnc_h.virtual_network_update(ip_fabric_vn_obj)

Crash is observed after above step.