Updated tenant_id to project_id in policy.py
Updated tenant_id to project_id in policy.py

Comments were referring to tenant_id where code says project_id

Closes-Bug: #1371017

Change-Id: I72f6c092f405fe130ca2c7430b7c00b70fb4abc8

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