try/except sleep unlink out/err files in tests.py

[dawson6]

Liu, Ben
Another feature request. On Windows systems, the deletion of the out/err files can sometimes fail because the file has not been finalized yet. Previously we added a try/except on the unlink to get around this (this is at the end of tests.py).

Would it be possible to sleep(1) and try again, then only give the log message if that also failed?

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[dawson6]

This may fit in with a another proposal to use a standard set of decorators to do handle these cases.