use pip cache directory
use pip cache directory

savi-dev/devstack,tianweizhang/devstack,BSJAIN92/OpenStack,ozamiatin/devstack,upadhyay-prashant/devstack,vsham20/devstack,affo/devstack,r-mibu/devstack,nuxeh/devstack,eshnil2000/devstack,cloudbuilders/devstack,bigswitch/devstack,ozamiatin/devstack,pombredanne/devstack,openstack-dev/devstack,prithivm/branch01,group-policy/devstack,varunarya10/devstack,group-policy/devstack,ewindisch/raspi-devstack,wenhuizhang/devstack,pombredanne/devstack,JioCloud/devstack,CloudServer/devstack,avvocatodemarchis/devstack,affo/devstack,promptworks/devstack,sc68cal/devstack,noironetworks/devstack,openstack-dev/devstack,pacinete/devstack,richliu/devstack,rushiagr/devstack,j4/devstack,sequenceiq/devstack,samgoon/devstack,promptworks/devstack,dirkmueller/devstack,ewindisch/raspi-devstack,costingalan/devstack,noironetworks/devstack,vishnugonela/devstack,HPCHub/devstack,atulpatil301/devstack,thomasem/devstack,sstrato/devstack,sc68cal/devstack,olivierlemasle/devstack,TwinkleChawla/devstack,HPCHub/devstack,varunarya10/devstack,bswartz/devstack,ykaneko/devstack,bljgaurav/openstack-test,citrix-openstack-build/devstack,mmasaki/devstack,CiscoSystems/devstack,vsham20/devstack,tianweizhang/devstack,Yuriy-Leonov/devstack,TwinkleChawla/devstack,nttmcl/devstack_public,NaokiMiyata/devstack,sequenceiq/devstack,Mahito/devstack,pczerkas/devstack,herrsechs/devstack,mssumanth/devstack,upadhyay-prashant/devstack,bljgaurav/openstack-test,flavio-fernandes/devstack,nuxeh/devstack,j4/devstack,avvocatodemarchis/devstack,thomasem/devstack,kplus/devstack-moonshot,samgoon/devstack,LoHChina/devstack,nttmcl/devstack_public,mc2014/devstack,dtroyer/devstack,bq-xiao/devstack,bswartz/devstack,dirkmueller/devstack,r-mibu/devstack,atulpatil301/devstack,Millnert/contrail-devstack,mssumanth/devstack,yamt/devstack,eharney/devstack,bq-xiao/devstack,neerja28/Devstack_GlusterFS,nawawi/openstack,parul24/devstack,dtroyer/devstack,LoHChina/devstack,citrix-openstack-build/devstack,ykaneko/devstack,wenhuizhang/devstack,vishnugonela/devstack,savi-dev/devstack,Juniper/devstack,cloudbuilders/devstack,olivierlemasle/devstack,costingalan/devstack,jamielennox/devstack,nati/devstack_public,liuquansheng47/devstack,deepakselvaraj/devstack,armando-migliaccio/devstack,NaokiMiyata/devstack,liuquansheng47/devstack,shootstar/devstacktest,pacinete/devstack,prithivm/branch01,nawawi/openstack,rushiagr/devstack,inkerra/devstack,kplus/devstack-moonshot,parul24/devstack,srics/devstack,neerja28/Devstack_GlusterFS,herrsechs/devstack,CloudServer/devstack,pczerkas/devstack,andrewrothstein/devstack,richliu/devstack,BSJAIN92/OpenStack,williamthegrey/devstack,nati/devstack_public,mc2014/devstack,flavio-fernandes/devstack,eharney/devstack,Mahito/devstack,mmasaki/devstack,bigswitch/devstack,virtualopensystems/devstack,innodee/openstackk,andrewrothstein/devstack