Limit Centaur TES tests at 4 threads in attempt to prevent exceeding open files limit  [BA-6153]
Limit Centaur TES tests at 4 threads in attempt to prevent exceeding open files limit  [BA-6153]

broadinstitute/cromwell,broadinstitute/cromwell,broadinstitute/cromwell,broadinstitute/cromwell,broadinstitute/cromwell