SPARK-1734: spark-submit throws an exception: Exception in thread "main"...

... java.lang.ClassNotFoundException: org.apache.spark.broadcast.TorrentBroadcastFactory

Author: witgo <witgo@qq.com>

Closes #665 from witgo/SPARK-1734 and squashes the following commits:

cacf238 [witgo] SPARK-1734: spark-submit throws an exception: Exception in thread "main" java.lang.ClassNotFoundException: org.apache.spark.broadcast.TorrentBroadcastFactory

core/src/main/scala/org/apache/spark/deploy/SparkSubmitArguments.scala

@@ -333,6 +333,6 @@ object SparkSubmitArguments {
         val message = s"Failed when loading Spark properties file ${file.getName}"
         throw new SparkException(message, e)
     }
-    properties.stringPropertyNames().toSeq.map(k => (k, properties(k)))
+    properties.stringPropertyNames().toSeq.map(k => (k, properties(k).trim))
   }
 }