[SPARK-3755][Core] Do not bind port 1 - 1024 to server in spark

Non-root user use port 1- 1024 to start jetty server will get the exception " java.net.SocketException: Permission denied", so not use these ports

Author: scwf <wangfei1@huawei.com>

Closes #2610 from scwf/1-1024 and squashes the following commits:

cb8cc76 [scwf] do not use port 1 - 1024

(cherry picked from commit 6390aae4eacbabfb1c53fb828b824f6a6518beff)
Signed-off-by: Andrew Or <andrewor14@gmail.com>
SPARK-2626 [DOCS] Stop SparkContext in all examples

Call SparkContext.stop() in all examples (and touch up minor nearby code style issues while at it)

Author: Sean Owen <sowen@cloudera.com>

Closes #2575 from srowen/SPARK-2626 and squashes the following commits:

5b2baae [Sean Owen] Call SparkContext.stop() in all examples (and touch up minor nearby code style issues while at it)

Conflicts:
	examples/src/main/python/parquet_inputformat.py
[SPARK-3756] [Core]check exception is caused by an address-port collision properly

Jetty server use MultiException to handle exceptions when start server
refer https://github.com/eclipse/jetty.project/blob/jetty-8.1.14.v20131031/jetty-server/src/main/java/org/eclipse/jetty/server/Server.java

So in ```isBindCollision``` add the logical to cover MultiException

Author: scwf <wangfei1@huawei.com>

Closes #2611 from scwf/fix-isBindCollision and squashes the following commits:

984cb12 [scwf] optimize the fix
3a6c849 [scwf] fix bug in isBindCollision

(cherry picked from commit 2fedb5dddcc10d3186f49fc4996a7bb5b68bbc85)
Signed-off-by: Patrick Wendell <pwendell@gmail.com>

Conflicts:
	core/src/main/scala/org/apache/spark/util/Utils.scala