[SPARK-15841][Tests] REPLSuite has incorrect env set for a couple of tests.

Description from JIRA.
In ReplSuite, for a test that can be tested well on just local should not really have to start a local-cluster. And similarly a test is in-sufficiently run if it's actually fixing a problem related to a distributed run in environment with local run.

Existing tests.

Author: Prashant Sharma <prashsh1@in.ibm.com>

Closes #13574 from ScrapCodes/SPARK-15841/repl-suite-fix.