Remove unnecessary code in test setUp/tearDown
Remove unnecessary code in test setUp/tearDown

Change-Id: I41c033dceafdf1ce39ff3dc11f11b54a909cec12

Yusuke1987/openstack_template,devoid/nova,jianghuaw/nova,gooddata/openstack-nova,Brocade-OpenSource/OpenStack-DNRM-Nova,sridevikoushik31/nova,houshengbo/nova_vmware_compute_driver,rajalokan/nova,noironetworks/nova,Juniper/nova,eharney/nova,ruslanloman/nova,gspilio/nova,Triv90/Nova,tudorvio/nova,cloudbase/nova,saleemjaveds/https-github.com-openstack-nova,JioCloud/nova_test_latest,thomasem/nova,affo/nova,raildo/nova,dims/nova,joker946/nova,JioCloud/nova_test_latest,cyx1231st/nova,mgagne/nova,klmitch/nova,BeyondTheClouds/nova,cloudbase/nova-virtualbox,Francis-Liu/animated-broccoli,fnordahl/nova,sacharya/nova,savi-dev/nova,edulramirez/nova,barnsnake351/nova,ewindisch/nova,mmnelemane/nova,dawnpower/nova,openstack/nova,petrutlucian94/nova,josephsuh/extra-specs,vmturbo/nova,NeCTAR-RC/nova,sridevikoushik31/openstack,dstroppa/openstack-smartos-nova-grizzly,hanlind/nova,gspilio/nova,leilihh/novaha,bigswitch/nova,imsplitbit/nova,petrutlucian94/nova_dev,houshengbo/nova_vmware_compute_driver,jianghuaw/nova,OpenAcademy-OpenStack/nova-scheduler,usc-isi/extra-specs,kimjaejoong/nova,tealover/nova,petrutlucian94/nova_dev,paulmathews/nova,yosshy/nova,MountainWei/nova,shahar-stratoscale/nova,eonpatapon/nova,NoBodyCam/TftpPxeBootBareMetal,belmiromoreira/nova,whitepages/nova,varunarya10/nova_test_latest,maoy/zknova,nikesh-mahalka/nova,usc-isi/extra-specs,viggates/nova,berrange/nova,varunarya10/nova_test_latest,takeshineshiro/nova,affo/nova,zaina/nova,sridevikoushik31/openstack,spring-week-topos/nova-week,j-carpentier/nova,JianyuWang/nova,usc-isi/nova,virtualopensystems/nova,sridevikoushik31/nova,hanlind/nova,TwinkleChawla/nova,edulramirez/nova,shail2810/nova,rickerc/nova_audit,mandeepdhami/nova,zhimin711/nova,angdraug/nova,klmitch/nova,SUSE-Cloud/nova,jeffrey4l/nova,vladikr/nova_drafts,whitepages/nova,bclau/nova,gooddata/openstack-nova,houshengbo/nova_vmware_compute_driver,vmturbo/nova,qwefi/nova,Juniper/nova,eonpatapon/nova,belmiromoreira/nova,tangfeixiong/nova,Tehsmash/nova,imsplitbit/nova,NewpTone/stacklab-nova,sridevikoushik31/openstack,luogangyi/bcec-nova,CiscoSystems/nova,silenceli/nova,watonyweng/nova,Stavitsky/nova,klmitch/nova,akash1808/nova,DirectXMan12/nova-hacking,Francis-Liu/animated-broccoli,sebrandon1/nova,alaski/nova,akash1808/nova_test_latest,scripnichenko/nova,maheshp/novatest,bgxavier/nova,leilihh/nova,rajalokan/nova,fajoy/nova,yatinkumbhare/openstack-nova,rahulunair/nova,adelina-t/nova,NoBodyCam/TftpPxeBootBareMetal,leilihh/nova,tianweizhang/nova,blueboxgroup/nova,isyippee/nova,mahak/nova,noironetworks/nova,vladikr/nova_drafts,tealover/nova,maoy/zknova,rrader/nova-docker-plugin,sridevikoushik31/nova,devendermishrajio/nova_test_latest,alexandrucoman/vbox-nova-driver,nikesh-mahalka/nova,usc-isi/nova,iuliat/nova,mikalstill/nova,scripnichenko/nova,tangfeixiong/nova,plumgrid/plumgrid-nova,luogangyi/bcec-nova,Tehsmash/nova,Triv90/Nova,badock/nova,sacharya/nova,sileht/deb-openstack-nova,cloudbau/nova,rahulunair/nova,JianyuWang/nova,yrobla/nova,eayunstack/nova,jianghuaw/nova,CEG-FYP-OpenStack/scheduler,apporc/nova,cloudbau/nova,silenceli/nova,virtualopensystems/nova,gspilio/nova,aristanetworks/arista-ovs-nova,cyx1231st/nova,JioCloud/nova,zzicewind/nova,felixma/nova,dstroppa/openstack-smartos-nova-grizzly,alvarolopez/nova,fajoy/nova,phenoxim/nova,josephsuh/extra-specs,shail2810/nova,ted-gould/nova,fnordahl/nova,cloudbase/nova-virtualbox,cernops/nova,Juniper/nova,MountainWei/nova,cloudbase/nova,zhimin711/nova,SUSE-Cloud/nova,hanlind/nova,gooddata/openstack-nova,akash1808/nova,Metaswitch/calico-nova,eneabio/nova,usc-isi/extra-specs,Metaswitch/calico-nova,CCI-MOC/nova,joker946/nova,badock/nova,felixma/nova,TieWei/nova,rajalokan/nova,mahak/nova,ruslanloman/nova,devendermishrajio/nova_test_latest,double12gzh/nova,sileht/deb-openstack-nova,shootstar/novatest,ted-gould/nova,jeffrey4l/nova,yatinkumbhare/openstack-nova,tanglei528/nova,watonyweng/nova,sridevikoushik31/nova,devoid/nova,mikalstill/nova,fajoy/nova,CiscoSystems/nova,openstack/nova,savi-dev/nova,shootstar/novatest,petrutlucian94/nova,berrange/nova,Yusuke1987/openstack_template,paulmathews/nova,j-carpentier/nova,sebrandon1/nova,maelnor/nova,sileht/deb-openstack-nova,yrobla/nova,bclau/nova,Juniper/nova,JioCloud/nova,CloudServer/nova,apporc/nova,blueboxgroup/nova,tudorvio/nova,josephsuh/extra-specs,bigswitch/nova,ewindisch/nova,saleemjaveds/https-github.com-openstack-nova,NeCTAR-RC/nova,openstack/nova,plumgrid/plumgrid-nova,tianweizhang/nova,maheshp/novatest,savi-dev/nova,mikalstill/nova,Yuriy-Leonov/nova,vmturbo/nova,Stavitsky/nova,redhat-openstack/nova,orbitfp7/nova,iuliat/nova,isyippee/nova,BeyondTheClouds/nova,NewpTone/stacklab-nova,CEG-FYP-OpenStack/scheduler,psiwczak/openstack,TieWei/nova,usc-isi/nova,raildo/nova,eneabio/nova,tanglei528/nova,yrobla/nova,phenoxim/nova,psiwczak/openstack,shahar-stratoscale/nova,paulmathews/nova,OpenAcademy-OpenStack/nova-scheduler,maelnor/nova,rahulunair/nova,rrader/nova-docker-plugin,LoHChina/nova,double12gzh/nova,alaski/nova,bgxavier/nova,eayunstack/nova,sebrandon1/nova,orbitfp7/nova,gooddata/openstack-nova,jianghuaw/nova,DirectXMan12/nova-hacking,ntt-sic/nova,yosshy/nova,alvarolopez/nova,adelina-t/nova,Yuriy-Leonov/nova,dawnpower/nova,TwinkleChawla/nova,aristanetworks/arista-ovs-nova,zaina/nova,cernops/nova,ntt-sic/nova,CloudServer/nova,mahak/nova,viggates/nova,NewpTone/stacklab-nova,kimjaejoong/nova,aristanetworks/arista-ovs-nova,citrix-openstack-build/nova,projectcalico/calico-nova,spring-week-topos/nova-week,citrix-openstack-build/nova,BeyondTheClouds/nova,NoBodyCam/TftpPxeBootBareMetal,Brocade-OpenSource/OpenStack-DNRM-Nova,devendermishrajio/nova,dstroppa/openstack-smartos-nova-grizzly,Triv90/Nova,rickerc/nova_audit,cernops/nova,LoHChina/nova,dims/nova,klmitch/nova,eharney/nova,alexandrucoman/vbox-nova-driver,rajalokan/nova,redhat-openstack/nova,qwefi/nova,takeshineshiro/nova,mandeepdhami/nova,angdraug/nova,maheshp/novatest,CCI-MOC/nova,cloudbase/nova,akash1808/nova_test_latest,mmnelemane/nova,DirectXMan12/nova-hacking,mgagne/nova,vmturbo/nova,eneabio/nova,devendermishrajio/nova,projectcalico/calico-nova,leilihh/novaha,thomasem/nova,barnsnake351/nova,psiwczak/openstack,maoy/zknova,zzicewind/nova