Optionally disable file locking.
Optionally disable file locking.

File locks in nova have a bad habit of lingering if the process that
created them is killed, and there isn't a good automated way to fix this
behavior. This option allows a deployer to avoid the problem if they
know they are only running a single nova process on a machine.

Change-Id: I1ae20cc54a4614b200093ffd581d3ab21d7c241b

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