Dump json for nova.network.model.Model objects
Dump json for nova.network.model.Model objects

The current repr for the network model objects is
hard to debug, it would be easier if we just
dumped a json blob to the logs which you can then
take and throw into a formatter.

Change-Id: If7f7999998d47a1c31137b549e7414afc9c07163

sebrandon1/nova,rahulunair/nova,openstack/nova,mahak/nova,gooddata/openstack-nova,Juniper/nova,rajalokan/nova,klmitch/nova,Juniper/nova,phenoxim/nova,rajalokan/nova,mikalstill/nova,mahak/nova,mikalstill/nova,rajalokan/nova,vmturbo/nova,rahulunair/nova,openstack/nova,openstack/nova,hanlind/nova,cloudbase/nova,jianghuaw/nova,cloudbase/nova,gooddata/openstack-nova,mikalstill/nova,klmitch/nova,vmturbo/nova,jianghuaw/nova,Juniper/nova,hanlind/nova,hanlind/nova,Juniper/nova,sebrandon1/nova,mahak/nova,cloudbase/nova,alaski/nova,alaski/nova,rahulunair/nova,sebrandon1/nova,klmitch/nova,jianghuaw/nova,rajalokan/nova,klmitch/nova,jianghuaw/nova,gooddata/openstack-nova,vmturbo/nova,gooddata/openstack-nova,vmturbo/nova,phenoxim/nova