Add graduated oslo code to requirements
Add graduated oslo code to requirements

This is the first step of the oslo usage cleanup.
The patches to clean-up the local copy of oslo code
will be submitted separately.

Change-Id: Ic59275e78478c328517960f010095b86f0030402
Partially-Implements: blueprint improve-oslo-usage

anthonydillon/horizon,newrocknj/horizon,mrunge/horizon_lib,BiznetGIO/horizon,watonyweng/horizon,BiznetGIO/horizon,orbitfp7/horizon,mrunge/horizon_lib,kfox1111/horizon,Hodorable/0602,noironetworks/horizon,agileblaze/OpenStackTwoFactorAuthentication,froyobin/horizon,sandvine/horizon,VaneCloud/horizon,redhat-cip/horizon,ging/horizon,openstack/horizon,Dark-Hacker/horizon,henaras/horizon,maestro-hybrid-cloud/horizon,coreycb/horizon,dan1/horizon-proto,redhat-openstack/horizon,xinwu/horizon,pranavtendolkr/horizon,yeming233/horizon,CiscoSystems/horizon,mrunge/openstack_horizon,mandeepdhami/horizon,endorphinl/horizon-fork,django-leonardo/horizon,damien-dg/horizon,endorphinl/horizon,tsufiev/horizon,ChameleonCloud/horizon,Mirantis/mos-horizon,endorphinl/horizon,Hodorable/0602,vladryk/horizon,redhat-cip/horizon,Tesora/tesora-horizon,mrunge/openstack_horizon,izadorozhna/dashboard_integration_tests,Solinea/horizon,damien-dg/horizon,damien-dg/horizon,CiscoSystems/avos,tellesnobrega/horizon,sandvine/horizon,karthik-suresh/horizon,kfox1111/horizon,saydulk/horizon,Mirantis/mos-horizon,CiscoSystems/horizon,agileblaze/OpenStackTwoFactorAuthentication,davidcusatis/horizon,agileblaze/OpenStackTwoFactorAuthentication,maestro-hybrid-cloud/horizon,luhanhan/horizon,gerrive/horizon,noironetworks/horizon,mdavid/horizon,tqtran7/horizon,FNST-OpenStack/horizon,sandvine/horizon,Daniex/horizon,davidcusatis/horizon,yjxtogo/horizon,noironetworks/horizon,NeCTAR-RC/horizon,Dark-Hacker/horizon,dan1/horizon-proto,idjaw/horizon,Metaswitch/horizon,promptworks/horizon,gerrive/horizon,NCI-Cloud/horizon,eayunstack/horizon,watonyweng/horizon,tqtran7/horizon,mdavid/horizon,saydulk/horizon,maestro-hybrid-cloud/horizon,wolverineav/horizon,mrunge/horizon,j4/horizon,karthik-suresh/horizon,dan1/horizon-proto,Daniex/horizon,dan1/horizon-x509,doug-fish/horizon,endorphinl/horizon-fork,maestro-hybrid-cloud/horizon,dan1/horizon-x509,takeshineshiro/horizon,kfox1111/horizon,idjaw/horizon,wangxiangyu/horizon,NeCTAR-RC/horizon,vladryk/horizon,nvoron23/avos,redhat-openstack/horizon,coreycb/horizon,RudoCris/horizon,mrunge/horizon_lib,VaneCloud/horizon,noironetworks/horizon,sandvine/horizon,doug-fish/horizon,redhat-cip/horizon,dan1/horizon-x509,takeshineshiro/horizon,karthik-suresh/horizon,Metaswitch/horizon,NeCTAR-RC/horizon,redhat-openstack/horizon,endorphinl/horizon-fork,orbitfp7/horizon,Hodorable/0602,yeming233/horizon,ging/horizon,Mirantis/mos-horizon,gerrive/horizon,redhat-cip/horizon,tqtran7/horizon,mdavid/horizon,blueboxgroup/horizon,FNST-OpenStack/horizon,froyobin/horizon,tellesnobrega/horizon,mdavid/horizon,CiscoSystems/avos,mandeepdhami/horizon,izadorozhna/dashboard_integration_tests,karthik-suresh/horizon,j4/horizon,VaneCloud/horizon,yeming233/horizon,nvoron23/avos,eayunstack/horizon,saydulk/horizon,Dark-Hacker/horizon,yeming233/horizon,philoniare/horizon,tsufiev/horizon,mrunge/openstack_horizon,liyitest/rr,coreycb/horizon,blueboxgroup/horizon,wolverineav/horizon,django-leonardo/horizon,saydulk/horizon,doug-fish/horizon,BiznetGIO/horizon,mandeepdhami/horizon,wangxiangyu/horizon,yjxtogo/horizon,ging/horizon,luhanhan/horizon,anthonydillon/horizon,FNST-OpenStack/horizon,pranavtendolkr/horizon,tellesnobrega/horizon,nvoron23/avos,nvoron23/avos,idjaw/horizon,NCI-Cloud/horizon,henaras/horizon,vladryk/horizon,FNST-OpenStack/horizon,endorphinl/horizon,tsufiev/horizon,NCI-Cloud/horizon,Hodorable/0602,icloudrnd/automation_tools,blueboxgroup/horizon,endorphinl/horizon,liyitest/rr,openstack/horizon,CiscoSystems/horizon,promptworks/horizon,BiznetGIO/horizon,Solinea/horizon,henaras/horizon,wangxiangyu/horizon,liyitest/rr,davidcusatis/horizon,anthonydillon/horizon,ChameleonCloud/horizon,RudoCris/horizon,yjxtogo/horizon,bac/horizon,damien-dg/horizon,dan1/horizon-x509,watonyweng/horizon,openstack/horizon,Daniex/horizon,j4/horizon,xinwu/horizon,django-leonardo/horizon,CiscoSystems/horizon,NeCTAR-RC/horizon,Metaswitch/horizon,Solinea/horizon,redhat-openstack/horizon,ChameleonCloud/horizon,froyobin/horizon,wangxiangyu/horizon,Tesora/tesora-horizon,pranavtendolkr/horizon,tsufiev/horizon,blueboxgroup/horizon,RudoCris/horizon,wolverineav/horizon,kfox1111/horizon,philoniare/horizon,NCI-Cloud/horizon,ging/horizon,Metaswitch/horizon,mrunge/horizon,icloudrnd/automation_tools,idjaw/horizon,davidcusatis/horizon,promptworks/horizon,henaras/horizon,pranavtendolkr/horizon,VaneCloud/horizon,j4/horizon,dan1/horizon-proto,newrocknj/horizon,wolverineav/horizon,icloudrnd/automation_tools,django-leonardo/horizon,bigswitch/horizon,bac/horizon,mrunge/horizon,Tesora/tesora-horizon,anthonydillon/horizon,newrocknj/horizon,watonyweng/horizon,CiscoSystems/avos,bigswitch/horizon,Solinea/horizon,CiscoSystems/avos,xinwu/horizon,philoniare/horizon,liyitest/rr,takeshineshiro/horizon,doug-fish/horizon,tellesnobrega/horizon,eayunstack/horizon,orbitfp7/horizon,Dark-Hacker/horizon,yjxtogo/horizon,luhanhan/horizon,coreycb/horizon,xinwu/horizon,luhanhan/horizon,mandeepdhami/horizon,tqtran7/horizon,ChameleonCloud/horizon,gerrive/horizon,RudoCris/horizon,newrocknj/horizon,philoniare/horizon,bigswitch/horizon,bac/horizon,agileblaze/OpenStackTwoFactorAuthentication,Daniex/horizon,Mirantis/mos-horizon,bac/horizon,takeshineshiro/horizon,vladryk/horizon,orbitfp7/horizon,bigswitch/horizon,xme1226/horizon,xme1226/horizon,openstack/horizon,promptworks/horizon,Tesora/tesora-horizon,icloudrnd/automation_tools,xme1226/horizon,endorphinl/horizon-fork