Args for worker rather than master

Args for worker rather than master

Author: Chen Chao <[email protected]>

Closes #587 from CrazyJvm/patch-6 and squashes the following commits:

b54b89f [Chen Chao] Args for worker rather than master

Author: CrazyJvm

core/src/main/scala/org/apache/spark/deploy/worker/WorkerArguments.scala

@@ -22,7 +22,7 @@ import java.lang.management.ManagementFactory
 import org.apache.spark.util.{IntParam, MemoryParam, Utils}
 
 /**
- * Command-line parser for the master.
+ * Command-line parser for the worker.
  */
 private[spark] class WorkerArguments(args: Array[String]) {
   var host = Utils.localHostName()