Syncs install_venv_common.py from oslo-incubator
Syncs install_venv_common.py from oslo-incubator

Needed to make run_tests.sh identify requirements correctly

We need to check requirements.txt and test-requirements.txt
in parallel to ensure both are satisfied and we don't upgrade
a package beyond requirements.txt's limits when installing
dependencies for test-requirements.txt

Fixes bug: 1227019

Change-Id: I606f8a1d3eed5c270d5b3c154994d5c3a17b98c8

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