Adding logging to Auth-Token Middleware
Adding logging to Auth-Token Middleware

- Under bp keystone-logging
- Added mostly debug logs to help troubleshooting

Change-Id: I94787963e1c0b40721a61fea31521e18292b3e51

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