Upgrade to helix-0.9
<!-- Configuration for unit/integration tests section 1 of 3 (properties) ENDS HERE.-->
<avro.version>1.7.6</avro.version>
<parquet.version>1.8.0</parquet.version>
- <helix.version>0.8.2</helix.version>
+ <helix.version>0.9.0</helix.version>
<zkclient.version>0.7</zkclient.version>
<jackson.version>2.9.8</jackson.version>
<async-http-client.version>1.9.21</async-http-client.version>
