Fixes bug 831574. Adds missing sys import.
Fixes bug 831574. Adds missing sys import.

Change-Id: I945d2d45e4cbb7637b11925b20d9caa7dd03a900

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