horizon/check_horizon_login.sh: check the OpenStack string to support RHEL horizon too
horizon/check_horizon_login.sh: check the OpenStack string to support RHEL horizon too

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