Bug report: Regression testing does not capture NaN's in output

[andrew-platt]

Bug description
The regression testing does not fail the test when NaN values exist in the test output files.

To Reproduce

• checkout bbbfdc3 (dev branch head on April 9, 2021) and corresponding r-test
• add flags -finit-real=inf -finit-integer=9999 to the gcc flags
• compile hydrodyn_driver with gcc 10
• Run hydrodyn driver regression test for the OC4Semi:
  • ctest -R hd_5MW_OC4Semi_WSt_WavesWN

The resulting <build_dir>/reg_tests/modules/hydrodyn/hd_5MW_OC4Semi_WSt_WavesWN/driver.HD.out will contain NaN in the columns for HydroMxi, HydroMyi, and HydroMzi but ctest will show the case as passing.

There is a bug in HydroDyn with uninitalized variables in the Morrison module that is causing this behavior. This will be addressed in a separate PR.

[andrew-platt]

Fixed with #713 and #718.