vol-rados test fails on Polaris

```
3/7 Test #3: h5vl_test_parallel ...............***Failed 0.09 sec
Start 4: h5_partest_t_bigio
4/7 Test #4: h5_partest_t_bigio ...............***Failed 0.01 sec
Start 5: h5_partest_t_pshutdown
5/7 Test #5: h5_partest_t_pshutdown ...........***Failed 0.01 sec
Start 6: h5_partest_t_shapesame
6/7 Test #6: h5_partest_t_shapesame ...........***Failed 0.01 sec
Start 7: h5_partest_testphdf5
7/7 Test #7: h5_partest_testphdf5 .............***Failed 0.01 sec

29% tests passed, 5 tests failed out of 7

```

Reproduce the failure on Polaris using the vol-rados test suite. Start with the five failing tests named in the report: h5vl_test_parallel, h5_partest_t_bigio, h5_partest_t_pshutdown, h5_partest_t_shapesame, and h5_partest_testphdf5. Done means identifying the cause and restoring passing results for the affected tests.

Written by the indexing model from the issue text.