split test for sdf_repartition since partitioning by column requires 2.0+
split test for sdf_repartition since partitioning by column requires 2.0+

rstudio/sparklyr,kevinykuo/sparklyr,rstudio/sparklyr,rstudio/sparklyr,rstudio/sparklyr,kevinykuo/sparklyr,kevinykuo/sparklyr,kevinykuo/sparklyr