Barry Smith authored Oct 08, 2020 and Satish Balay committed Dec 29, 2020

Now PETSc examples will ONLY return PETSc error codes and never MPI error codes directly so we can understand and post-process their
   errors better.

The test harness will now automatically retry tests that fail with MPI, this may help with Intel MPI that produces
   seemingly random failures.

Commit-type: error-checking
/spend 30m