Parallelize Tests

[rahulsom]

This will use all available cores to run tests, and parallelize by all - suite/class/method. On machines with multiple cores, this will vastly improve test performance. These times are on my M1 MBP with 10 (8P + 2E) cores. They were reported by maven on running mvn verify.

I first ran mvn verify and ignored the time.
Then I ran it thrice without this change, and thrice with this change.

All times in seconds.

	Run 1	Run 2	Run 3	Average
Before	74	72	73	73
After	68	68	68	68
Savings				5
%				7

Testing done

All existing tests run

Submitter checklist

Beta Give feedback

1. Make sure you are opening from a topic/feature/bugfix branch (right side) and not your main branch!
2. Ensure that the pull request title represents the desired changelog entry
3. Please describe what you did
4. Link to relevant issues in GitHub or Jira
5. Link to relevant pull requests, esp. upstream and downstream changes
6. Ensure you have provided tests - that demonstrates feature works or fixes the issue

[codecov]

Codecov Report

Merging #932 (848f6ce) into master (98d6c78) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #932   +/-   ##
=========================================
  Coverage     92.89%   92.89%           
  Complexity     2322     2322           
=========================================
  Files           341      341           
  Lines          6450     6450           
  Branches        669      669           
=========================================
  Hits           5992     5992           
  Misses          262      262           
  Partials        196      196           

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[uhafner]

Thanks! Maybe I should make this a default in all my projects...