Pipeline "failure reason" loses some information

[vreuter]

NBD b/c the info is still available in the stack trace generally (always, I think), but for example, on a KeyError, the message would look like this:

Failure reason: 'z_px'

which loses the error type and could potentially be confusing, if that's consumed by any log reading tool that displays the failure reason, or if the traceback were lost. Ideally, we could also emit the error type in the message. Failure reason: 'z_px'

pypiper/pypiper/manager.py

Line 2000 in d1e3ece

self.info("Failure reason: " + str(exc))