Adds monasca-ui to horizon
Adds monasca-ui to horizon

'config_monasca_dashboard' method added and called so if
'ENABLE_MONASCA' is set this merhod will add monasca-ui to horizon.

Change-Id: If46d0d629a678f9878f36f1cfbe31153ab5ebf9b
Implements: blueprint monasca-ui
Signed-off-by: Hamed Bahadorzadeh <ddf8bf77033d30aae192d333ef8b15bc25645cf6@gmail.com>

stackforge/kolla,openstack/kolla,openstack/kolla,rahulunair/kolla,rahulunair/kolla,stackforge/kolla,stackforge/kolla