Replace usage of urllib in nova rest api
Replace usage of urllib in nova rest api

urllib is incompatible for python 3.

Change-Id: I3d70cd3f77a946afd4e873823edfdc5bd0e07a16

endorphinl/horizon,izadorozhna/dashboard_integration_tests,tqtran7/horizon,newrocknj/horizon,davidcusatis/horizon,henaras/horizon,philoniare/horizon,coreycb/horizon,redhat-cip/horizon,doug-fish/horizon,django-leonardo/horizon,BiznetGIO/horizon,Tesora/tesora-horizon,bac/horizon,Hodorable/0602,yeming233/horizon,endorphinl/horizon,pranavtendolkr/horizon,davidcusatis/horizon,django-leonardo/horizon,yeming233/horizon,Solinea/horizon,Metaswitch/horizon,dan1/horizon-x509,Solinea/horizon,tellesnobrega/horizon,mandeepdhami/horizon,pranavtendolkr/horizon,VaneCloud/horizon,noironetworks/horizon,NCI-Cloud/horizon,endorphinl/horizon-fork,doug-fish/horizon,luhanhan/horizon,django-leonardo/horizon,ChameleonCloud/horizon,FNST-OpenStack/horizon,Daniex/horizon,bigswitch/horizon,gerrive/horizon,coreycb/horizon,kfox1111/horizon,NeCTAR-RC/horizon,anthonydillon/horizon,karthik-suresh/horizon,luhanhan/horizon,promptworks/horizon,gerrive/horizon,bigswitch/horizon,Daniex/horizon,j4/horizon,watonyweng/horizon,agileblaze/OpenStackTwoFactorAuthentication,eayunstack/horizon,damien-dg/horizon,agileblaze/OpenStackTwoFactorAuthentication,redhat-openstack/horizon,mdavid/horizon,coreycb/horizon,idjaw/horizon,eayunstack/horizon,luhanhan/horizon,NCI-Cloud/horizon,Dark-Hacker/horizon,Hodorable/0602,yjxtogo/horizon,ChameleonCloud/horizon,liyitest/rr,kfox1111/horizon,maestro-hybrid-cloud/horizon,BiznetGIO/horizon,newrocknj/horizon,tqtran7/horizon,yjxtogo/horizon,coreycb/horizon,promptworks/horizon,tqtran7/horizon,xinwu/horizon,NeCTAR-RC/horizon,Metaswitch/horizon,mdavid/horizon,mandeepdhami/horizon,liyitest/rr,Metaswitch/horizon,henaras/horizon,noironetworks/horizon,maestro-hybrid-cloud/horizon,Hodorable/0602,karthik-suresh/horizon,redhat-cip/horizon,henaras/horizon,sandvine/horizon,yjxtogo/horizon,tellesnobrega/horizon,bigswitch/horizon,vladryk/horizon,idjaw/horizon,philoniare/horizon,sandvine/horizon,django-leonardo/horizon,promptworks/horizon,VaneCloud/horizon,blueboxgroup/horizon,tqtran7/horizon,tellesnobrega/horizon,VaneCloud/horizon,icloudrnd/automation_tools,icloudrnd/automation_tools,Mirantis/mos-horizon,yeming233/horizon,doug-fish/horizon,mandeepdhami/horizon,damien-dg/horizon,blueboxgroup/horizon,Dark-Hacker/horizon,BiznetGIO/horizon,bac/horizon,wolverineav/horizon,luhanhan/horizon,saydulk/horizon,openstack/horizon,mdavid/horizon,karthik-suresh/horizon,ChameleonCloud/horizon,icloudrnd/automation_tools,ChameleonCloud/horizon,Metaswitch/horizon,endorphinl/horizon-fork,watonyweng/horizon,RudoCris/horizon,saydulk/horizon,bac/horizon,davidcusatis/horizon,NeCTAR-RC/horizon,noironetworks/horizon,noironetworks/horizon,Daniex/horizon,redhat-openstack/horizon,mdavid/horizon,wangxiangyu/horizon,dan1/horizon-x509,FNST-OpenStack/horizon,takeshineshiro/horizon,Solinea/horizon,eayunstack/horizon,idjaw/horizon,endorphinl/horizon-fork,bac/horizon,takeshineshiro/horizon,RudoCris/horizon,NeCTAR-RC/horizon,dan1/horizon-x509,henaras/horizon,Solinea/horizon,redhat-openstack/horizon,icloudrnd/automation_tools,j4/horizon,Daniex/horizon,gerrive/horizon,VaneCloud/horizon,openstack/horizon,j4/horizon,dan1/horizon-x509,newrocknj/horizon,wangxiangyu/horizon,Mirantis/mos-horizon,RudoCris/horizon,dan1/horizon-proto,liyitest/rr,vladryk/horizon,Dark-Hacker/horizon,redhat-cip/horizon,Tesora/tesora-horizon,maestro-hybrid-cloud/horizon,takeshineshiro/horizon,wolverineav/horizon,wangxiangyu/horizon,yjxtogo/horizon,agileblaze/OpenStackTwoFactorAuthentication,RudoCris/horizon,openstack/horizon,Hodorable/0602,agileblaze/OpenStackTwoFactorAuthentication,wolverineav/horizon,Dark-Hacker/horizon,vladryk/horizon,j4/horizon,anthonydillon/horizon,damien-dg/horizon,liyitest/rr,maestro-hybrid-cloud/horizon,kfox1111/horizon,endorphinl/horizon,davidcusatis/horizon,dan1/horizon-proto,vladryk/horizon,xinwu/horizon,kfox1111/horizon,redhat-cip/horizon,FNST-OpenStack/horizon,tellesnobrega/horizon,xinwu/horizon,anthonydillon/horizon,dan1/horizon-proto,mandeepdhami/horizon,watonyweng/horizon,openstack/horizon,gerrive/horizon,saydulk/horizon,idjaw/horizon,sandvine/horizon,endorphinl/horizon-fork,Tesora/tesora-horizon,blueboxgroup/horizon,doug-fish/horizon,damien-dg/horizon,redhat-openstack/horizon,anthonydillon/horizon,saydulk/horizon,watonyweng/horizon,xinwu/horizon,Tesora/tesora-horizon,wolverineav/horizon,izadorozhna/dashboard_integration_tests,BiznetGIO/horizon,dan1/horizon-proto,pranavtendolkr/horizon,bigswitch/horizon,NCI-Cloud/horizon,NCI-Cloud/horizon,blueboxgroup/horizon,pranavtendolkr/horizon,yeming233/horizon,newrocknj/horizon,wangxiangyu/horizon,endorphinl/horizon,promptworks/horizon,FNST-OpenStack/horizon,sandvine/horizon,Mirantis/mos-horizon,karthik-suresh/horizon,Mirantis/mos-horizon,philoniare/horizon,takeshineshiro/horizon,philoniare/horizon