Added a fix to support OSX date %N
Added a fix to support OSX date %N

SparkTC/spark-bench,ElfoLiNk/spark-bench,ibmsoe/spark-bench,ecurtin/spark-bench,ElfoLiNk/spark-bench,ibmsoe/spark-bench,ecurtin/spark-bench,SparkTC/spark-bench,marcoszh/spark-bench,marcoszh/spark-bench