[SUREFIRE-1656] Print Total Elapsed Time of Tests

**[David Mollitor](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=belugabehr)** opened **[SUREFIRE-1656](https://issues.apache.org/jira/browse/SUREFIRE-1656?redirect=false)** and commented

```java
[INFO] Running org.apache.avro.reflect.TestReflectData
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 2.022 s - in org.apache.avro.reflect.TestReflectData
[INFO] Running org.apache.avro.TestDataFileCustomSync
[INFO] Tests run: 3, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0 s - in org.apache.avro.TestDataFileCustomSync
[INFO]
[INFO] Results:
[INFO]
[WARNING] Tests run: 3163, Failures: 0, Errors: 0, Skipped: 1
[INFO]
[INFO]
```

There is a per-test-suite 'time elapsed' value. Please add a total 'time elapsed' as part of the results output.

---
No further details from [SUREFIRE-1656](https://issues.apache.org/jira/browse/SUREFIRE-1656?redirect=false)

Start by locating the results-output code that emits the per-test-suite "Time elapsed" lines and the existing tests for the final results summary. Run the relevant Surefire tests before changing anything; done means the results output includes a total elapsed time alongside the aggregate test counts.

Written by the indexing model from the issue text.