Update tls prameters

Author: mgirgisf

templates/ceilometercompute/config/ceilometer.conf

@@ -34,9 +34,9 @@ transport_url={{ .TransportURL }}
 [polling]
 heartbeat_socket_dir=/var/lib/ceilometer
 {{- if .TLS }}
-Prometheus_tls_enable = True
-Prometheus_tls_cert = {{ .TlsCert }}
-Prometheus_tls_key = {{ .TlsKey }}
+prometheus_tls_enable = True
+prometheus_tls_certfile = {{ .TlsCert }}
+prometheus_tls_keyfile = {{ .TlsKey }}
 {{- end }}
 
 [publisher]