Add unit tests for /db/api.py#fixed_ip_*
Add unit tests for /db/api.py#fixed_ip_*

Implements: some tests for db methods fixed_ip_* for blueprint db-api-tests
Change-Id: I51fe24600b7df2b529350ad70939a01f60bd3c9c

eayunstack/nova,mikalstill/nova,watonyweng/nova,openstack/nova,varunarya10/nova_test_latest,bgxavier/nova,affo/nova,Juniper/nova,BeyondTheClouds/nova,CloudServer/nova,devendermishrajio/nova,berrange/nova,DirectXMan12/nova-hacking,mmnelemane/nova,TieWei/nova,vmturbo/nova,mahak/nova,fnordahl/nova,Tehsmash/nova,orbitfp7/nova,tudorvio/nova,badock/nova,whitepages/nova,kimjaejoong/nova,alvarolopez/nova,petrutlucian94/nova,eharney/nova,DirectXMan12/nova-hacking,Metaswitch/calico-nova,apporc/nova,mahak/nova,akash1808/nova_test_latest,cloudbase/nova,zaina/nova,redhat-openstack/nova,rajalokan/nova,SUSE-Cloud/nova,ted-gould/nova,LoHChina/nova,whitepages/nova,klmitch/nova,devoid/nova,bgxavier/nova,nikesh-mahalka/nova,jianghuaw/nova,double12gzh/nova,CiscoSystems/nova,luogangyi/bcec-nova,MountainWei/nova,scripnichenko/nova,phenoxim/nova,leilihh/novaha,isyippee/nova,NeCTAR-RC/nova,JianyuWang/nova,vmturbo/nova,hanlind/nova,JianyuWang/nova,edulramirez/nova,rajalokan/nova,tanglei528/nova,sridevikoushik31/nova,sridevikoushik31/nova,Stavitsky/nova,cyx1231st/nova,vmturbo/nova,cloudbase/nova,takeshineshiro/nova,shootstar/novatest,Yuriy-Leonov/nova,klmitch/nova,iuliat/nova,cloudbase/nova,Juniper/nova,zaina/nova,belmiromoreira/nova,thomasem/nova,virtualopensystems/nova,takeshineshiro/nova,qwefi/nova,alaski/nova,JioCloud/nova,TwinkleChawla/nova,shootstar/novatest,jianghuaw/nova,noironetworks/nova,LoHChina/nova,shail2810/nova,edulramirez/nova,dawnpower/nova,mandeepdhami/nova,rajalokan/nova,devendermishrajio/nova_test_latest,CiscoSystems/nova,devendermishrajio/nova_test_latest,zzicewind/nova,barnsnake351/nova,dawnpower/nova,blueboxgroup/nova,gooddata/openstack-nova,tealover/nova,gooddata/openstack-nova,double12gzh/nova,virtualopensystems/nova,rajalokan/nova,devendermishrajio/nova,adelina-t/nova,cloudbau/nova,joker946/nova,silenceli/nova,rahulunair/nova,Tehsmash/nova,cernops/nova,mikalstill/nova,mikalstill/nova,ted-gould/nova,bclau/nova,OpenAcademy-OpenStack/nova-scheduler,silenceli/nova,tanglei528/nova,Francis-Liu/animated-broccoli,yosshy/nova,rickerc/nova_audit,gooddata/openstack-nova,ewindisch/nova,ntt-sic/nova,iuliat/nova,eonpatapon/nova,joker946/nova,projectcalico/calico-nova,NeCTAR-RC/nova,citrix-openstack-build/nova,raildo/nova,JioCloud/nova,alaski/nova,cloudbau/nova,rrader/nova-docker-plugin,ewindisch/nova,isyippee/nova,sacharya/nova,petrutlucian94/nova_dev,CEG-FYP-OpenStack/scheduler,blueboxgroup/nova,zhimin711/nova,tealover/nova,dims/nova,mandeepdhami/nova,viggates/nova,leilihh/novaha,fnordahl/nova,JioCloud/nova_test_latest,SUSE-Cloud/nova,vmturbo/nova,Juniper/nova,zhimin711/nova,JioCloud/nova_test_latest,watonyweng/nova,Yusuke1987/openstack_template,openstack/nova,ruslanloman/nova,sebrandon1/nova,shail2810/nova,orbitfp7/nova,felixma/nova,raildo/nova,nikesh-mahalka/nova,yatinkumbhare/openstack-nova,viggates/nova,rickerc/nova_audit,thomasem/nova,varunarya10/nova_test_latest,sebrandon1/nova,leilihh/nova,OpenAcademy-OpenStack/nova-scheduler,shahar-stratoscale/nova,shahar-stratoscale/nova,rrader/nova-docker-plugin,plumgrid/plumgrid-nova,jianghuaw/nova,bigswitch/nova,projectcalico/calico-nova,vladikr/nova_drafts,cyx1231st/nova,sridevikoushik31/nova,tianweizhang/nova,scripnichenko/nova,klmitch/nova,tudorvio/nova,noironetworks/nova,tangfeixiong/nova,akash1808/nova,mgagne/nova,affo/nova,akash1808/nova_test_latest,rahulunair/nova,CCI-MOC/nova,alexandrucoman/vbox-nova-driver,citrix-openstack-build/nova,alvarolopez/nova,redhat-openstack/nova,Juniper/nova,cernops/nova,ntt-sic/nova,cernops/nova,saleemjaveds/https-github.com-openstack-nova,ruslanloman/nova,BeyondTheClouds/nova,DirectXMan12/nova-hacking,bclau/nova,luogangyi/bcec-nova,hanlind/nova,sacharya/nova,MountainWei/nova,kimjaejoong/nova,Metaswitch/calico-nova,jianghuaw/nova,petrutlucian94/nova,Yuriy-Leonov/nova,barnsnake351/nova,eonpatapon/nova,badock/nova,maelnor/nova,plumgrid/plumgrid-nova,alexandrucoman/vbox-nova-driver,sebrandon1/nova,klmitch/nova,bigswitch/nova,gooddata/openstack-nova,qwefi/nova,TwinkleChawla/nova,yosshy/nova,angdraug/nova,mahak/nova,akash1808/nova,jeffrey4l/nova,mgagne/nova,tianweizhang/nova,Brocade-OpenSource/OpenStack-DNRM-Nova,yatinkumbhare/openstack-nova,BeyondTheClouds/nova,felixma/nova,devoid/nova,petrutlucian94/nova_dev,maelnor/nova,Stavitsky/nova,apporc/nova,spring-week-topos/nova-week,leilihh/nova,j-carpentier/nova,cloudbase/nova-virtualbox,mmnelemane/nova,cloudbase/nova-virtualbox,adelina-t/nova,eayunstack/nova,berrange/nova,imsplitbit/nova,eharney/nova,phenoxim/nova,TieWei/nova,jeffrey4l/nova,sridevikoushik31/nova,angdraug/nova,Brocade-OpenSource/OpenStack-DNRM-Nova,Yusuke1987/openstack_template,spring-week-topos/nova-week,openstack/nova,saleemjaveds/https-github.com-openstack-nova,CEG-FYP-OpenStack/scheduler,j-carpentier/nova,hanlind/nova,Francis-Liu/animated-broccoli,zzicewind/nova,rahulunair/nova,imsplitbit/nova,CCI-MOC/nova,CloudServer/nova,belmiromoreira/nova,dims/nova,vladikr/nova_drafts,tangfeixiong/nova