Replace the code to check for Option != None with Option.isDefined call in Scala code.

core/src/main/scala/org/apache/spark/Partitioner.scala

...a/org/apache/spark/deploy/master/ui/ApplicationPage.scala

...c/main/scala/org/apache/spark/metrics/MetricsConfig.scala

.../org/apache/spark/partial/ApproximateActionListener.scala

...c/main/scala/org/apache/spark/partial/PartialResult.scala

core/src/main/scala/org/apache/spark/rdd/RDD.scala

.../main/scala/org/apache/spark/scheduler/DAGScheduler.scala

core/src/main/scala/org/apache/spark/scheduler/Stage.scala

.../scala/org/apache/spark/scheduler/TaskSchedulerImpl.scala

...n/scala/org/apache/spark/storage/BlockManagerWorker.scala

...src/main/scala/org/apache/spark/storage/MemoryStore.scala

core/src/main/scala/org/apache/spark/util/Utils.scala

...cala/org/apache/spark/scheduler/TaskSetManagerSuite.scala

...st/scala/org/apache/spark/storage/BlockManagerSuite.scala