Redirect test case output to their individual output files.

Nobody has claimed this yet.

Currently, all the test cases in a module output their logging to a single file `test.log`.
Also there are some console output from the test cases interleaving with formal status and result on the console.
We can re-direct the logging output and console output to individual output file for each test case. On the console, the test result will be displayed cleanly without output in between.
```
-------------------------------------------------------
T E S T S
-------------------------------------------------------
Running org.janusgraph.diskstorage.solr.BerkeleySolrTest
Tests run: 23, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 141.503 sec - in org.janusgraph.diskstorage.solr.BerkeleySolrTest
Running org.janusgraph.diskstorage.solr.SolrIndexTest
Tests run: 16, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 33.565 sec - in org.janusgraph.diskstorage.solr.SolrIndexTest

```
Surefire and failsafe plugs' `redirectTestOutputToFile `property will be used.
Each test case TestA will have a TestA-output.txt in the surefire or failsafe report directory for easy diagnostic.

Start by locating the Surefire and Failsafe plugin configuration and the redirectTestOutputToFile property. Verify that each test case writes its console and logging output to an individual report-directory file, while the console retains clean test status and results.

Written by the indexing model from the issue text.