Close file descriptors when executing sub-processes
Close file descriptors when executing sub-processes

Pass close_fds=True to subprocess.Popen(), as is currently done in
nova.utils.execute().

Fixes bug #1130735

Change-Id: Iec21873d7ef3957847f3b7365fadd613ccf1349d

Metaswitch/calico-neutron,noironetworks/neutron,cisco-openstack/neutron,watonyweng/neutron,yanheven/neutron,virtualopensystems/neutron,vijayendrabvs/ssl-neutron,cloudbase/neutron,kaiweifan/neutron,aristanetworks/neutron,silenci/neutron,yamt/neutron,shahbazn/neutron,paninetworks/neutron,rdo-management/neutron,chitr/neutron,vveerava/Openstack,armando-migliaccio/neutron,vbannai/neutron,vivekanand1101/neutron,waltBB/neutron_read,ykaneko/quantum,jumpojoy/neutron,yamahata/tacker,vijayendrabvs/ssl-neutron,miyakz1192/neutron,gopal1cloud/neutron,dhanunjaya/neutron,antonioUnina/neutron,yamt/neutron,oeeagle/quantum,waltBB/neutron_read,citrix-openstack-build/neutron,gkotton/neutron,kaiweifan/vse-lbaas-plugin-poc,gopal1cloud/neutron,CiscoSystems/neutron,openstack/neutron,ntt-sic/neutron,beagles/neutron_hacking,vveerava/Openstack,vivekanand1101/neutron,beagles/neutron_hacking,mahak/neutron,Comcast/neutron,infobloxopen/neutron,javaos74/neutron,Juniper/contrail-dev-neutron,CiscoSystems/vespa,suneeth51/neutron,bgxavier/neutron,cernops/neutron,CiscoSystems/vespa,armando-migliaccio/neutron,JioCloud/neutron,netscaler/neutron,yuewko/neutron,projectcalico/calico-neutron,pnavarro/neutron,Stavitsky/neutron,CiscoSystems/quantum,leeseuljeong/leeseulstack_neutron,jacknjzhou/neutron,ntt-sic/neutron,jacknjzhou/neutron,Juniper/neutron,ykaneko/quantum,barnsnake351/neutron,gkotton/neutron,barnsnake351/neutron,adelina-t/neutron,ykaneko/quantum,bigswitch/neutron,SmartInfrastructures/neutron,bgxavier/neutron,mandeepdhami/neutron,Brocade-OpenSource/OpenStack-DNRM-Neutron,mmnelemane/neutron,alexandrucoman/vbox-neutron-agent,kaiweifan/neutron,leeseulstack/openstack,liqin75/vse-vpnaas-plugin,ntt-sic/neutron,Comcast/neutron,neoareslinux/neutron,tpaszkowski/quantum,mmnelemane/neutron,adelina-t/neutron,cloudbase/neutron-virtualbox,kaiweifan/neutron,netscaler/neutron,JianyuWang/neutron,dims/neutron,projectcalico/calico-neutron,vbannai/neutron,Brocade-OpenSource/OpenStack-DNRM-Neutron,wolverineav/neutron,sajuptpm/neutron-ipam,alexandrucoman/vbox-neutron-agent,suneeth51/neutron,swdream/neutron,NeCTAR-RC/neutron,CiscoSystems/neutron,sasukeh/neutron,cloudbase/neutron-virtualbox,ykaneko/neutron,vijayendrabvs/ssl-neutron,Juniper/neutron,leeseuljeong/leeseulstack_neutron,redhat-openstack/neutron,openstack/neutron,Brocade-OpenSource/OpenStack-DNRM-Neutron,vbannai/neutron,ykaneko/quantum,SamYaple/neutron,CiscoSystems/quantum,armando-migliaccio/neutron,vijayendrabvs/hap,citrix-openstack-build/neutron,ykaneko/neutron,wenhuizhang/neutron,sebrandon1/neutron,mattt416/neutron,cisco-openstack/neutron,sebrandon1/neutron,SmartInfrastructures/neutron,vveerava/Openstack,armando-migliaccio/neutron,sasukeh/neutron,yamahata/tacker,liqin75/vse-vpnaas-plugin,huntxu/neutron,jerryz1982/neutron,skyddv/neutron,tpaszkowski/quantum,tpaszkowski/quantum,liqin75/vse-vpnaas-plugin,CiscoSystems/neutron,watonyweng/neutron,wenhuizhang/neutron,infobloxopen/neutron,dhanunjaya/neutron,MaximNevrov/neutron,glove747/liberty-neutron,gkotton/neutron,aristanetworks/neutron,MaximNevrov/neutron,rdo-management/neutron,oeeagle/quantum,yamahata/tacker,openstack/neutron,igor-toga/local-snat,NeCTAR-RC/neutron,kaiweifan/vse-lbaas-plugin-poc,swdream/neutron,yamt/neutron,klmitch/neutron,cernops/neutron,eayunstack/neutron,yanheven/neutron,Stavitsky/neutron,javaos74/neutron,mandeepdhami/neutron,blueboxgroup/neutron,blueboxgroup/neutron,citrix-openstack-build/neutron,sajuptpm/neutron-ipam,blueboxgroup/neutron,miyakz1192/neutron,mahak/neutron,cloudbase/neutron,zhhf/charging,paninetworks/neutron,yamt/neutron,magic0704/neutron,eonpatapon/neutron,magic0704/neutron,Juniper/neutron,jerryz1982/neutron,rickerc/neutron_audit,Juniper/contrail-dev-neutron,ykaneko/neutron,CiscoSystems/quantum,beagles/neutron_hacking,noironetworks/neutron,bigswitch/neutron,mahak/neutron,eayunstack/neutron,kaiweifan/vse-lbaas-plugin-poc,huntxu/neutron,glove747/liberty-neutron,Juniper/contrail-dev-neutron,klmitch/neutron,apporc/neutron,sajuptpm/neutron-ipam,shahbazn/neutron,virtualopensystems/neutron,pnavarro/neutron,dims/neutron,asgard-lab/neutron,yamahata/neutron,jumpojoy/neutron,silenci/neutron,rickerc/neutron_audit,asgard-lab/neutron,vijayendrabvs/hap,apporc/neutron,takeshineshiro/neutron,zhhf/charging,leeseulstack/openstack,eonpatapon/neutron,yamahata/neutron,virtualopensystems/neutron,takeshineshiro/neutron,wolverineav/neutron,mattt416/neutron,leeseuljeong/leeseulstack_neutron,liqin75/vse-vpnaas-plugin,yamahata/neutron,igor-toga/local-snat,skyddv/neutron,chitr/neutron,JianyuWang/neutron,zhhf/charging,redhat-openstack/neutron,CiscoSystems/vespa,netscaler/neutron,vijayendrabvs/hap,kaiweifan/vse-lbaas-plugin-poc,Comcast/neutron,leeseulstack/openstack,SamYaple/neutron,yuewko/neutron,neoareslinux/neutron,rickerc/neutron_audit,antonioUnina/neutron,tpaszkowski/quantum,Metaswitch/calico-neutron,JioCloud/neutron