SPARK-3639 | Removed settings master in examples

This patch removes setting of master as local in Kinesis examples so
that users can set it using submit-job.
Merge remote-tracking branch 'origin/Kinesis-Examples-Master-Unset' into Kinesis-Examples-Master-Unset

Conflicts:
	extras/kinesis-asl/src/main/java/org/apache/spark/examples/streaming/JavaKinesisWordCountASL.java
	extras/kinesis-asl/src/main/scala/org/apache/spark/examples/streaming/KinesisWordCountASL.scala