Including additional test for Null value
Including additional test for Null value

Check that an IllegalArgumentException is thrown.

mariusoe/influxdb-java,influxdb/influxdb-java,mariusoe/influxdb-java,influxdata/influxdb-java,influxdata/influxdb-java,jzonthemtn/influxdb-java,fernandopeinado/influxdb-java,jzonthemtn/influxdb-java,RaphaelAudet/influxdb-java,fernandopeinado/influxdb-java,RaphaelAudet/influxdb-java