spill test running out of disk space

[ntabris]

I've noticed that spill test is not infrequently getting OSError(28, 'No space left on device').

Here are most recent 100 instances:

no-space-exception.csv

Maybe two issues here:

1. Adjust test so it doesn't run out of disk space (since I don't think this is intended)
2. Better detection for this error / relevant exceptions that occur during test runs

[ntabris]

cc @hendrikmakait @ian-r-rose

[ian-r-rose]

Over in #235 I adjusted the numbers on this test to make it rather less stressful and time consuming (as it stands, it's a huge fraction of the total test suite runtime).

[hendrikmakait]

It looks like the changes in #235 might have taken care of this.