Set default keystone auth_token signing_dir loc.
Set default keystone auth_token signing_dir loc.

Updates the nova api-paste.ini file with a custom signing_dir
for Nova. This works around potential multi-service permission issues which
can occur when multiple OpenStack services share a common signing directory.

Change-Id: I99df63838fd41a4cade99b54da9511978b0d1a86

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