Remove auth_uri, already have auth_host, auth_port
Remove auth_uri, already have auth_host, auth_port

Remove to clarify config

From keystone docs:
`auth_uri``: (optional, defaults to `auth_protocol`://`auth_host`:`auth_port`)

Change-Id: I4349cd9545c571b37886ae38416c27b841e797f8

qwefi/nova,cloudbase/nova,tudorvio/nova,jeffrey4l/nova,citrix-openstack-build/nova,plumgrid/plumgrid-nova,tangfeixiong/nova,TieWei/nova,Stavitsky/nova,JianyuWang/nova,shootstar/novatest,petrutlucian94/nova,Metaswitch/calico-nova,paulmathews/nova,MountainWei/nova,aristanetworks/arista-ovs-nova,DirectXMan12/nova-hacking,gooddata/openstack-nova,barnsnake351/nova,maelnor/nova,alaski/nova,adelina-t/nova,rajalokan/nova,akash1808/nova_test_latest,JioCloud/nova,rahulunair/nova,akash1808/nova,redhat-openstack/nova,aristanetworks/arista-ovs-nova,usc-isi/extra-specs,badock/nova,shahar-stratoscale/nova,orbitfp7/nova,Juniper/nova,petrutlucian94/nova_dev,berrange/nova,hanlind/nova,usc-isi/extra-specs,hanlind/nova,JioCloud/nova,saleemjaveds/https-github.com-openstack-nova,berrange/nova,j-carpentier/nova,jianghuaw/nova,cloudbase/nova,klmitch/nova,tangfeixiong/nova,isyippee/nova,zhimin711/nova,josephsuh/extra-specs,DirectXMan12/nova-hacking,Brocade-OpenSource/OpenStack-DNRM-Nova,j-carpentier/nova,noironetworks/nova,rickerc/nova_audit,Yusuke1987/openstack_template,OpenAcademy-OpenStack/nova-scheduler,mikalstill/nova,apporc/nova,leilihh/novaha,rajalokan/nova,Stavitsky/nova,bclau/nova,eonpatapon/nova,isyippee/nova,leilihh/nova,aristanetworks/arista-ovs-nova,usc-isi/nova,mahak/nova,redhat-openstack/nova,alexandrucoman/vbox-nova-driver,Juniper/nova,jeffrey4l/nova,noironetworks/nova,Juniper/nova,joker946/nova,SUSE-Cloud/nova,CloudServer/nova,CCI-MOC/nova,sacharya/nova,bigswitch/nova,belmiromoreira/nova,barnsnake351/nova,watonyweng/nova,BeyondTheClouds/nova,NoBodyCam/TftpPxeBootBareMetal,tealover/nova,maheshp/novatest,CiscoSystems/nova,Triv90/Nova,Yuriy-Leonov/nova,bigswitch/nova,Brocade-OpenSource/OpenStack-DNRM-Nova,shootstar/novatest,OpenAcademy-OpenStack/nova-scheduler,tudorvio/nova,sridevikoushik31/openstack,phenoxim/nova,phenoxim/nova,houshengbo/nova_vmware_compute_driver,blueboxgroup/nova,angdraug/nova,eonpatapon/nova,sebrandon1/nova,CCI-MOC/nova,maoy/zknova,savi-dev/nova,edulramirez/nova,scripnichenko/nova,maoy/zknova,angdraug/nova,bgxavier/nova,houshengbo/nova_vmware_compute_driver,houshengbo/nova_vmware_compute_driver,savi-dev/nova,luogangyi/bcec-nova,gspilio/nova,gspilio/nova,TwinkleChawla/nova,devoid/nova,fajoy/nova,vladikr/nova_drafts,rrader/nova-docker-plugin,whitepages/nova,gspilio/nova,ted-gould/nova,alaski/nova,mandeepdhami/nova,varunarya10/nova_test_latest,ruslanloman/nova,ntt-sic/nova,citrix-openstack-build/nova,openstack/nova,NoBodyCam/TftpPxeBootBareMetal,affo/nova,rahulunair/nova,takeshineshiro/nova,viggates/nova,Juniper/nova,JioCloud/nova_test_latest,rrader/nova-docker-plugin,rajalokan/nova,cloudbase/nova-virtualbox,mmnelemane/nova,tianweizhang/nova,raildo/nova,cloudbase/nova,klmitch/nova,Francis-Liu/animated-broccoli,mikalstill/nova,luogangyi/bcec-nova,double12gzh/nova,scripnichenko/nova,plumgrid/plumgrid-nova,LoHChina/nova,josephsuh/extra-specs,yosshy/nova,affo/nova,silenceli/nova,devendermishrajio/nova,CEG-FYP-OpenStack/scheduler,spring-week-topos/nova-week,paulmathews/nova,akash1808/nova,projectcalico/calico-nova,BeyondTheClouds/nova,fajoy/nova,sridevikoushik31/nova,double12gzh/nova,eayunstack/nova,dims/nova,CiscoSystems/nova,eayunstack/nova,psiwczak/openstack,belmiromoreira/nova,adelina-t/nova,MountainWei/nova,akash1808/nova_test_latest,yrobla/nova,ntt-sic/nova,petrutlucian94/nova,Tehsmash/nova,jianghuaw/nova,bgxavier/nova,sridevikoushik31/nova,sridevikoushik31/openstack,mandeepdhami/nova,yosshy/nova,whitepages/nova,alvarolopez/nova,shail2810/nova,imsplitbit/nova,hanlind/nova,maheshp/novatest,iuliat/nova,devoid/nova,petrutlucian94/nova_dev,alexandrucoman/vbox-nova-driver,sacharya/nova,Francis-Liu/animated-broccoli,rickerc/nova_audit,virtualopensystems/nova,cloudbau/nova,cernops/nova,zzicewind/nova,vmturbo/nova,bclau/nova,nikesh-mahalka/nova,rajalokan/nova,NewpTone/stacklab-nova,paulmathews/nova,spring-week-topos/nova-week,imsplitbit/nova,projectcalico/calico-nova,Yuriy-Leonov/nova,jianghuaw/nova,fnordahl/nova,gooddata/openstack-nova,NeCTAR-RC/nova,tanglei528/nova,ewindisch/nova,usc-isi/nova,vmturbo/nova,badock/nova,dstroppa/openstack-smartos-nova-grizzly,savi-dev/nova,TwinkleChawla/nova,yrobla/nova,openstack/nova,thomasem/nova,mgagne/nova,yatinkumbhare/openstack-nova,zzicewind/nova,cloudbase/nova-virtualbox,kimjaejoong/nova,cernops/nova,zaina/nova,tealover/nova,dawnpower/nova,sridevikoushik31/nova,varunarya10/nova_test_latest,klmitch/nova,leilihh/nova,JioCloud/nova_test_latest,cyx1231st/nova,qwefi/nova,klmitch/nova,openstack/nova,ruslanloman/nova,devendermishrajio/nova,eharney/nova,devendermishrajio/nova_test_latest,JianyuWang/nova,nikesh-mahalka/nova,Tehsmash/nova,devendermishrajio/nova_test_latest,zaina/nova,maheshp/novatest,vmturbo/nova,mahak/nova,CloudServer/nova,josephsuh/extra-specs,kimjaejoong/nova,viggates/nova,orbitfp7/nova,cloudbau/nova,psiwczak/openstack,rahulunair/nova,jianghuaw/nova,gooddata/openstack-nova,felixma/nova,usc-isi/extra-specs,sebrandon1/nova,fnordahl/nova,usc-isi/nova,yrobla/nova,joker946/nova,iuliat/nova,silenceli/nova,watonyweng/nova,DirectXMan12/nova-hacking,fajoy/nova,maoy/zknova,saleemjaveds/https-github.com-openstack-nova,Yusuke1987/openstack_template,Triv90/Nova,vladikr/nova_drafts,eharney/nova,sebrandon1/nova,tanglei528/nova,vmturbo/nova,mikalstill/nova,dims/nova,mmnelemane/nova,dawnpower/nova,maelnor/nova,psiwczak/openstack,LoHChina/nova,CEG-FYP-OpenStack/scheduler,felixma/nova,NeCTAR-RC/nova,zhimin711/nova,dstroppa/openstack-smartos-nova-grizzly,alvarolopez/nova,apporc/nova,ted-gould/nova,mgagne/nova,mahak/nova,NoBodyCam/TftpPxeBootBareMetal,sridevikoushik31/openstack,ewindisch/nova,raildo/nova,shahar-stratoscale/nova,tianweizhang/nova,takeshineshiro/nova,cernops/nova,BeyondTheClouds/nova,NewpTone/stacklab-nova,dstroppa/openstack-smartos-nova-grizzly,TieWei/nova,cyx1231st/nova,shail2810/nova,sridevikoushik31/nova,Triv90/Nova,yatinkumbhare/openstack-nova,thomasem/nova,blueboxgroup/nova,NewpTone/stacklab-nova,edulramirez/nova,gooddata/openstack-nova,SUSE-Cloud/nova,leilihh/novaha,Metaswitch/calico-nova,virtualopensystems/nova