Programmer-Magnus

This PR shows how junit can use many cores and threads to run tests in parallel. This make running tests use less wall clock time. This should not be added...

Divide and conquer less threads

2

**Describe the PR** Divide and conquer can use 'this' thread instead of creating a second thread and then wait for the two new ones to finish their tasks. **Test Cases**...

Result change betwen ojAlgo version 53 and 54 or later

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When I update ojAlgo my tests stumble on a case that gives OPTIMAL in version 53 of ojAlgo but give INFEASIBLE in v54 and later. I tried 55.1.2 with same...