L3VPN CSIT failure post MRI actviity

As part of MRI activity, there are lot of code changes done(PFA) in netvirt. We are trying to stabilize CSIT post this failure and currently have 9 failure pending on l3vpn.

I tired to narrow down the issue(but not yet find the root cause) to some extent and see the following two reason for these failure.

1. After router is disassociated with L3VPN(2200:2), the fib entries are not added back into router vpn.
2. On deletion on L3VPN(2200:2), its remaining in pending_delete state in vpn-instance-op-data due to vpn-to-dpn-list not cleared. Resulting in further testcase failure which attempts to create same L3VPN.

Can you of us have a quick look on these issue so that we can close on MRI activity(which will unblock other pending patches for get merged)

The below JOB have TRACE level logs enabled for neutronvpn,vpnmanager and fibmanager modules and this will be cleared by tomorrow(as part sandbox job weekly clean-up)

https://logs.opendaylight.org/sandbox/vex-yul-odl-jenkins-2/srini-netvirt-csit-1node-0cmb-1ctl-2cmp-openstack-queens-upstream-stateful-itm-direct-tunnels-magnesium/7/

CSIT Link : https://jenkins.opendaylight.org/releng/view/netvirt-csit/job/netvirt-csit-1node-0cmb-1ctl-2cmp-openstack-queens-upstream-stateful-magnesium/61/robot/