Hydra stops being able to build if given a jobset with a unicode character in its name

[expipiplus1]

I have a jobset named foo bar… (note the single ellipses character).

Every time hydra-evaluator encounters this job it fails with "specified jobset does not exist".

The evaluator is never able to progress past this jobset, and loops forever trying.

This is closely related to #343, although it would be nice if hydra could handle jobsets with any string as a name, there's certainly something fishy if it's requiring strings are in special forms. I don't know if Perl's type system is able to cope with enforcing this though.

[expipiplus1]

Oh, It would be really handy if someone can tell me how to remove this naughty-named jobset from the queue so I don't have to nuke the server's state. "cancel queued non-current builds" didn't work.

[expipiplus1]

#360 Is useful in debugging this.

[expipiplus1]

To fix this:

delete from jobsets where name = 'foo bar…';