[SPARK-24206][SQL][FOLLOW-UP] Update DataSourceReadBenchmark benchmark results

## What changes were proposed in this pull request?
This pr corrected the default configuration (`spark.master=local[1]`) for benchmarks. Also, this updated performance results on the AWS `r3.xlarge`.

## How was this patch tested?
N/A

Author: Takeshi Yamamuro <[email protected]>

Closes #21625 from maropu/FixDataSourceReadBenchmark.

Author: maropu