SPARK-1565, update examples to be used with spark-submit script.

Commit for initial feedback, basically I am curious if we should prompt user for providing args esp. when its mandatory. And can we skip if they are not ?

Also few other things that did not work like
`bin/spark-submit examples/target/scala-2.10/spark-examples-1.0.0-SNAPSHOT-hadoop1.0.4.jar --class org.apache.spark.examples.SparkALS --arg 100 500 10 5 2`

Not all the args get passed properly, may be I have messed up something will try to sort it out hopefully.

Author: Prashant Sharma <prashant.s@imaginea.com>

Closes #552 from ScrapCodes/SPARK-1565/update-examples and squashes the following commits:

669dd23 [Prashant Sharma] Review comments
2727e70 [Prashant Sharma] SPARK-1565, update examples to be used with spark-submit script.

1 files changed, 4 insertions, 4 deletions

diff --git a/core/src/main/scala/org/apache/spark/SparkContext.scala b/core/src/main/scala/org/apache/spark/SparkContext.scala
index eb14d87467..9d7c2c8d3d 100644
--- a/core/src/main/scala/org/apache/spark/SparkContext.scala
+++ b/core/src/main/scala/org/apache/spark/SparkContext.scala
@@ -74,10 +74,10 @@ class SparkContext(config: SparkConf) extends Logging {
    * be generated using [[org.apache.spark.scheduler.InputFormatInfo.computePreferredLocations]]
    * from a list of input files or InputFormats for the application.
    */
-    @DeveloperApi
-    def this(config: SparkConf, preferredNodeLocationData: Map[String, Set[SplitInfo]]) = {
-      this(config)
-      this.preferredNodeLocationData = preferredNodeLocationData
+  @DeveloperApi
+  def this(config: SparkConf, preferredNodeLocationData: Map[String, Set[SplitInfo]]) = {
+    this(config)
+    this.preferredNodeLocationData = preferredNodeLocationData
   }
 
   /**