Make the controller addresses configurable.
Make the controller addresses configurable.

The addresses in sample_data were hard-coded to localhost. This is
a problem when deploying not-so-all-in-one deployment -- one controller
and couple of compute nodes. It was also complicating access from
outside.

Change-Id: Iee53c3f4376c3628e1543afb6dc7e964a3a14ab2

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