apache/spark — pull request #2115 by hzw19900416 (2014-08-25 14:14:47+00:00)
Title: [SPARK-3201][YARN-Stable] Make the yarn-client support the extraJavaOptions

it's very inconvenient if we want to set the "-X" java opts in the process of "ExecutorLauncher".
So I add it in yarn-client mode.