Python 2.6 subprocess.check_output doesn't exist.
Python 2.6 subprocess.check_output doesn't exist.

bug 905482

Change-Id: Id83ca0d6d9759dcab397361ddc11f71ebe0798e7

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