n-net: add more debug logging to release_fixed_ip
n-net: add more debug logging to release_fixed_ip

Despite commit 8c7690221294d6d7f2db84491fec8d81ef358cac we're still
seeing this race in the gate so add more debug logging in the
release_fixed_ip method to get a better idea of what's going on.

Related-Bug: #1249065

Change-Id: I9eda6cadf8aa31576bedf10c71c41fe1a3d4d629

rahulunair/nova,yosshy/nova,jianghuaw/nova,devendermishrajio/nova,raildo/nova,rajalokan/nova,ted-gould/nova,zhimin711/nova,cernops/nova,j-carpentier/nova,vmturbo/nova,sebrandon1/nova,openstack/nova,Francis-Liu/animated-broccoli,hanlind/nova,apporc/nova,klmitch/nova,Juniper/nova,raildo/nova,cloudbase/nova,NeCTAR-RC/nova,cloudbase/nova,felixma/nova,mikalstill/nova,edulramirez/nova,MountainWei/nova,JianyuWang/nova,ted-gould/nova,fnordahl/nova,BeyondTheClouds/nova,openstack/nova,CEG-FYP-OpenStack/scheduler,mikalstill/nova,rajalokan/nova,CEG-FYP-OpenStack/scheduler,apporc/nova,cyx1231st/nova,gooddata/openstack-nova,felixma/nova,Juniper/nova,rajalokan/nova,rahulunair/nova,noironetworks/nova,BeyondTheClouds/nova,alaski/nova,klmitch/nova,bigswitch/nova,hanlind/nova,vmturbo/nova,openstack/nova,gooddata/openstack-nova,klmitch/nova,scripnichenko/nova,jianghuaw/nova,gooddata/openstack-nova,mahak/nova,yosshy/nova,Francis-Liu/animated-broccoli,BeyondTheClouds/nova,scripnichenko/nova,dims/nova,bigswitch/nova,cloudbase/nova,sebrandon1/nova,cernops/nova,NeCTAR-RC/nova,noironetworks/nova,hanlind/nova,jianghuaw/nova,mikalstill/nova,MountainWei/nova,dims/nova,TwinkleChawla/nova,rajalokan/nova,fnordahl/nova,gooddata/openstack-nova,CCI-MOC/nova,CCI-MOC/nova,rahulunair/nova,edulramirez/nova,devendermishrajio/nova,klmitch/nova,sebrandon1/nova,cernops/nova,mahak/nova,vmturbo/nova,jianghuaw/nova,phenoxim/nova,Juniper/nova,zhimin711/nova,alaski/nova,TwinkleChawla/nova,mahak/nova,phenoxim/nova,cyx1231st/nova,vmturbo/nova,j-carpentier/nova,Juniper/nova,JianyuWang/nova