## What changes were proposed in this pull request?

Maven compilation seem to not allow resource is sql/test to be easily referred to in kafka-0-10-sql tests. So moved the kafka-source-offset-version-2.1.0 from sql test resources to kafka-0-10-sql test resources.

## How was this patch tested?

Manually ran maven test

Author: Tathagata Das <tathagata.das1565@gmail.com>

Closes #16183 from tdas/SPARK-18671-1.

(cherry picked from commit 5c6bcdbd)
Signed-off-by: Tathagata Das <tathagata.das1565@gmail.com>