Add notifications when libvirtd goes down
Add notifications when libvirtd goes down

During driver status update from periodic tasks, if we find that
the libvirtd is down then we should send send notifications and
log an error.

Fixes LP #1011087

Change-Id: I447f24e4ac719d2d550810509f72be6f270ce326

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