env in travis
env in travis

yhuai/spark-sql-perf,levyx/spark-sql-perf,dongjoon-hyun/spark-sql-perf,databricks/spark-sql-perf,josiahsams/spark-sql-perf-spark2.0.0,databricks/spark-sql-perf,josiahsams/spark-sql-perf-spark2.0.0,yhuai/spark-sql-perf,levyx/spark-sql-perf,dongjoon-hyun/spark-sql-perf,databricks/spark-sql-perf