Merge pull request #154 from alfonsorr/fix/avoid-executing-spark-task…

…s-if-result-is-not-evaluated

Avoid making an execution not used later.

src/main/scala/com/github/mrpowers/spark/fast/tests/DatasetComparer.scala

@@ -139,7 +139,6 @@ Expected DataFrame Row Count: '$expectedCount'
           unequalRDDMessage(unequalRDD, maxUnequalRowsToShow)
         )
       }
-      unequalRDD.take(maxUnequalRowsToShow)
 
     } finally {
       ds1.rdd.unpersist()
@@ -173,4 +172,4 @@ Expected DataFrame Row Count: '$expectedCount'
 
 object DatasetComparer {
   val maxUnequalRowsToShow = 10
-}
+}