use env to find 'false'. Fix for OS X
use env to find 'false'. Fix for OS X

Change-Id: I0d899d5600c29b81d54358f950b24e2062ca0712

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