scripts/horizon/check_horizon_login.sh: rename ENDPOINT_URL to HORIZON_URL
scripts/horizon/check_horizon_login.sh: rename ENDPOINT_URL to HORIZON_URL

stackforge/monitoring-for-openstack,tcpcloud/monitoring-for-openstack,stackforge/monitoring-for-openstack,openstack/monitoring-for-openstack,padthaitofuhot/monitoring-for-openstack,magic0704/monitoring-for-openstack,openstack/monitoring-for-openstack,magic0704/monitoring-for-openstack,tcpcloud/monitoring-for-openstack,padthaitofuhot/monitoring-for-openstack