Test Utilities.t fails when a process is runnin that matches the word "nonexistent"

[andk]

It is this test: https://metacpan.org/source/MSIMERSON/Mail-Toaster-5.54/t/Utility.t#L478

On a smoker (but also anywhere else) you cannot be sure that such a process will not be running.

Sample fail report:

http://www.cpantesters.org/cpan/report/4eb83440-e333-11e9-8012-43b4f912d455

[msimerson]

Aware. I'm unlikely to "fix" it. PRs are welcome.

[eserte]

Adding a random number next to "nonexistent" should be enough.