Fixes Bug 1063852
Fixes Bug 1063852

Add in the issue time, to prevent a race condition where a token is issued and
revoked, and then a request for an additional token is processed identical
to the first.  Each token now contains the issue time to make it unique.

(moving changing default to PKI to separate review)

Change-Id: I26ed5b3bb31840f5baaf64dbcbeac477e4d71afd

cbrucks/Federated_Keystone,mahak/keystone,citrix-openstack-build/keystone,rajalokan/keystone,jamielennox/keystone,townbull/keystone-dtrust,ntt-sic/keystone,ging/keystone,openstack/keystone,UTSA-ICS/keystone-kerberos,cernops/keystone,jamielennox/keystone,kwss/keystone,maestro-hybrid-cloud/keystone,rajalokan/keystone,ilay09/keystone,ajayaa/keystone,ntt-sic/keystone,ilay09/keystone,ajayaa/keystone,blueboxgroup/keystone,kwss/keystone,dims/keystone,rickerc/keystone_audit,rushiagr/keystone,derekchiang/keystone,takeshineshiro/keystone,ilay09/keystone,JioCloud/keystone,blueboxgroup/keystone,citrix-openstack-build/keystone,reeshupatel/demo,promptworks/keystone,jonnary/keystone,UTSA-ICS/keystone-kerberos,ging/keystone,cloudbau/keystone,reeshupatel/demo,derekchiang/keystone,himanshu-setia/keystone,himanshu-setia/keystone,JioCloud/keystone,nuxeh/keystone,idjaw/keystone,rickerc/keystone_audit,vivekdhayaal/keystone,promptworks/keystone,maestro-hybrid-cloud/keystone,reeshupatel/demo,dsiddharth/access-keys,dims/keystone,ntt-sic/keystone,jumpstarter-io/keystone,nuxeh/keystone,jumpstarter-io/keystone,MaheshIBM/keystone,rodrigods/keystone,idjaw/keystone,mahak/keystone,kwss/keystone,rodrigods/keystone,dsiddharth/access-keys,takeshineshiro/keystone,dstanek/keystone,vivekdhayaal/keystone,rushiagr/keystone,townbull/keystone-dtrust,vivekdhayaal/keystone,jumpstarter-io/keystone,MaheshIBM/keystone,cbrucks/Federated_Keystone,mahak/keystone,roopali8/keystone,derekchiang/keystone,nuxeh/keystone,dstanek/keystone,citrix-openstack-build/keystone,rickerc/keystone_audit,dstanek/keystone,rushiagr/keystone,jonnary/keystone,cloudbau/keystone,openstack/keystone,cernops/keystone,dsiddharth/access-keys,roopali8/keystone,rajalokan/keystone,cloudbau/keystone,klmitch/keystone,townbull/keystone-dtrust,promptworks/keystone,openstack/keystone,klmitch/keystone,cbrucks/Federated_Keystone