Avoid the hard coding of admin token
Avoid the hard coding of admin token

The config provides a default value for the admin token, so the admin
token can be fetched from the config directly.

Change-Id: I0cb0738d0347ce07c06c28284579c028891eb4e2

jamielennox/keystone,dstanek/keystone,dims/keystone,klmitch/keystone,dstanek/keystone,ilay09/keystone,openstack/keystone,vivekdhayaal/keystone,mahak/keystone,mahak/keystone,ajayaa/keystone,cernops/keystone,mahak/keystone,openstack/keystone,cernops/keystone,dstanek/keystone,roopali8/keystone,jonnary/keystone,himanshu-setia/keystone,maestro-hybrid-cloud/keystone,rajalokan/keystone,klmitch/keystone,idjaw/keystone,ajayaa/keystone,vivekdhayaal/keystone,ilay09/keystone,roopali8/keystone,rajalokan/keystone,openstack/keystone,jamielennox/keystone,jonnary/keystone,takeshineshiro/keystone,himanshu-setia/keystone,idjaw/keystone,ilay09/keystone,takeshineshiro/keystone,dims/keystone,maestro-hybrid-cloud/keystone,vivekdhayaal/keystone,rajalokan/keystone