heat_keystoneclient make token auth work
heat_keystoneclient make token auth work

username/password are ignored so don't pass them, and
tenant needs to be the context tenant not the service
tenant or token auth will fail.

Fixes bug 1072944

Change-Id: I862d0041daad278dfe7bc16d59dc733dde90e758
Signed-off-by: Steven Hardy <4d1810d1ff6d7f22d774341c4549c02173d2f2ab@redhat.com>

pshchelo/heat,redhat-openstack/heat,jasondunsmore/heat,maestro-hybrid-cloud/heat,openstack/heat,cryptickp/heat,dragorosson/heat,redhat-openstack/heat,dims/heat,srznew/heat,rickerc/heat_audit,srznew/heat,Triv90/Heat,gonzolino/heat,maestro-hybrid-cloud/heat,noironetworks/heat,rdo-management/heat,rh-s/heat,rh-s/heat,pratikmallya/heat,ntt-sic/heat,cwolferh/heat-scratch,NeCTAR-RC/heat,steveb/heat,Triv90/Heat,cwolferh/heat-scratch,takeshineshiro/heat,rickerc/heat_audit,citrix-openstack-build/heat,jasondunsmore/heat,JioCloud/heat,miguelgrinberg/heat,gonzolino/heat,steveb/heat,dims/heat,miguelgrinberg/heat,rdo-management/heat,varunarya10/heat,noironetworks/heat,JioCloud/heat,pratikmallya/heat,citrix-openstack-build/heat,takeshineshiro/heat,openstack/heat,ntt-sic/heat,dragorosson/heat,varunarya10/heat,cryptickp/heat,Triv90/Heat,NeCTAR-RC/heat,pshchelo/heat