l2.Delete Vm Instances In net_1 fails with rc=1. This only happens in the l2 suite on the first network. Then it's related subnet fails to delete and then the security group fails to delete.

https://logs.opendaylight.org/releng/vex-yul-odl-jenkins-1/netvirt-csit-1node-openstack-ocata-upstream-stateful-nitrogen/820/log_01_l2.html.gz#s1-t23