[SPARK-4012] stop SparkContext when the exception is thrown from an infinite loop

https://issues.apache.org/jira/browse/SPARK-4012

This patch is a resubmission for https://github.com/apache/spark/pull/2864

What I am proposing in this patch is that ***when the exception is thrown from an infinite loop, we should stop the SparkContext, instead of let JVM throws exception forever***

So, in the infinite loops where we originally wrapped with a ` logUncaughtExceptions`, I changed to `tryOrStopSparkContext`, so that the Spark component is stopped

Early stopped JVM process is helpful for HA scheme design, for example,

The user has a script checking the existence of the pid of the Spark Streaming driver for monitoring the availability; with the code before this patch, the JVM process is still available but not functional when the exceptions are thrown

andrewor14, srowen , mind taking further consideration about the change?

Author: CodingCat <zhunansjtu@gmail.com>

Closes #5004 from CodingCat/SPARK-4012-1 and squashes the following commits:

589276a [CodingCat] throw fatal error again
3c72cd8 [CodingCat] address the comments
6087864 [CodingCat] revise comments
6ad3eb0 [CodingCat] stop SparkContext instead of quit the JVM process
6322959 [CodingCat] exit JVM process when the exception is thrown from an infinite loop