Fixed link to test file for more examples.

Teh old link (https://github.com/majst01/influxdb-java/blob/master/src/test/java/org/influxdb/InfluxDBTest.java) led to a 404. Updated the link to point to the correct location.
Merge pull request #15 from anthonyjchriste/patch-2

Fixed link to test file for more examples.