Add test coverage for both types of not-found-ness in neutronclient for floating
Add test coverage for both types of not-found-ness in neutronclient for floating

This adds coverage for the exceptions.NotFound case when we're getting
floating IPs from neutronclient. It makes the NeutronClientException case
the "legacy" one that we can remove when we fix that bug.

Change-Id: I9c8b20e076527f98085265755a2d2503c703f235
Partial-Bug: 1513879

sebrandon1/nova,jianghuaw/nova,rajalokan/nova,mikalstill/nova,klmitch/nova,apporc/nova,sebrandon1/nova,cernops/nova,zhimin711/nova,cyx1231st/nova,mahak/nova,rajalokan/nova,jianghuaw/nova,cloudbase/nova,mahak/nova,klmitch/nova,vmturbo/nova,gooddata/openstack-nova,klmitch/nova,bigswitch/nova,cernops/nova,NeCTAR-RC/nova,alaski/nova,BeyondTheClouds/nova,jianghuaw/nova,BeyondTheClouds/nova,dims/nova,gooddata/openstack-nova,mikalstill/nova,cyx1231st/nova,devendermishrajio/nova,sebrandon1/nova,vmturbo/nova,openstack/nova,Juniper/nova,BeyondTheClouds/nova,hanlind/nova,vmturbo/nova,phenoxim/nova,apporc/nova,Juniper/nova,jianghuaw/nova,klmitch/nova,alaski/nova,dims/nova,cloudbase/nova,rahulunair/nova,mahak/nova,cernops/nova,phenoxim/nova,Juniper/nova,rajalokan/nova,NeCTAR-RC/nova,Juniper/nova,rahulunair/nova,rajalokan/nova,zhimin711/nova,gooddata/openstack-nova,gooddata/openstack-nova,CEG-FYP-OpenStack/scheduler,openstack/nova,vmturbo/nova,mikalstill/nova,hanlind/nova,cloudbase/nova,hanlind/nova,openstack/nova,rahulunair/nova,bigswitch/nova,CEG-FYP-OpenStack/scheduler,devendermishrajio/nova