libvirt: Fix log message when disable/enable a host
libvirt: Fix log message when disable/enable a host

When disable/enable a host, the log message is not correct. As
nova compute will log message saying the host was disabled when
enable a host and log message saying the host was enabled when
disable a host.

We should do as this:
update to disable -> log message should be the host was disabled
update to enable -> log message should be the host was enabled

Change-Id: I394e92fe6fe5ffa06464f1ba93e9fc2acec942ef
Closes-Bug: #1251822

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