Sample config help for supplied drivers
Sample config help for supplied drivers

It's helpful to have a hint what are the allowed values for the
drivers in the config file when there's several to choose from.

Change-Id: I556a33d253e2bfc57a5d204f2de24c787cc01195

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