[DRE-maint] Bug#1093520: puma: FTBFS: test failures

[Santiago Vila]

retitle 1093520 puma: FTBFS: test failures
thanks

Hello. While it's true that this package seems to fail systematically on single-cpu systems,
the failing test in those cases (single-cpu) is this one:

TestWebConcurrencyAuto#test_web_concurrency_with_concurrent_ruby_available

which is not the error reported by Emilio.

I'm therefore restoring the old title and will report the single-cpu failure separately.

Thanks.