Test suite tests not always reproducible

[hpreusse]

I did notice that at least some test files do not generate reproducible reesults. Have a look at two test runs on architecture ppc64el (not sure if that matters). One of the two runs were succesful, the oher failed. Both time the same source code of check_logfiles was used. AFAICT this in not the only case, were the test suire generates non-reproducile results.

Thanks for having a lokk at this!