Parallel ctest fails

[junghans]

Building Silo-4.12.0 (https://koji.fedoraproject.org/koji/taskinfo?taskID=139170416) parallel ctest fails:

126/167 Test #151: partial-io-setup ...................Subprocess aborted***Exception:   0.11 sec
db_hdf5_Create: File not found or invalid permissions: rect2d.h5
Testing h5 driver...
   rect2d.h5
SILO Aborting...

[markcmiller86]

For now, I would not run the CTest logic in parallel. I think it needs work that I did not have expertise to resolve by time of release nor did I find a way to prevent parallel test execution that didn't involve a ton of extra CMake logic.