Template update for Hawkular Metrics 0.23

roles/openshift_metrics/templates/hawkular_metrics_rc.j2

@@ -37,6 +37,7 @@ spec:
         - "-Dhawkular.metrics.openshift.htpasswd-file=/secrets/hawkular-metrics.htpasswd.file"
         - "-Dhawkular.metrics.allowed-cors-access-control-allow-headers=authorization"
         - "-Dhawkular.metrics.default-ttl={{openshift_metrics_duration}}"
+        - "-Dhawkular.metrics.admin-tenant=_hawkular_admin"
         - "-Dhawkular-alerts.cassandra-nodes=hawkular-cassandra"
         - "-Dhawkular-alerts.cassandra-use-ssl"
         - "-Dhawkular.alerts.openshift.auth-methods=openshift-oauth,htpasswd"
@@ -44,6 +45,7 @@ spec:
         - "-Dhawkular.alerts.allowed-cors-access-control-allow-headers=authorization"
         - "-Dorg.apache.tomcat.util.buf.UDecoder.ALLOW_ENCODED_SLASH=true"
         - "-Dorg.apache.catalina.connector.CoyoteAdapter.ALLOW_BACKSLASH=true"
+        - "-Dcom.datastax.driver.FORCE_NIO=true"
         - "-DKUBERNETES_MASTER_URL={{openshift_metrics_master_url}}"
         - "-DUSER_WRITE_ACCESS={{openshift_metrics_hawkular_user_write_access}}"
         - "--hmw.keystore=/secrets/hawkular-metrics.keystore"