Remove duplicate variable _host_state
Remove duplicate variable _host_state

* The variable _host_state is initialized twice in __init__() method of libvirt driver.
This patch removes the second occurrence.

Fixes bug #1214431

Change-Id: I13f175abcbce7752afb0d8c69ee209928afa1eb3

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