Change log.error to log.exception

[Akarys42]

log.exception(msg) write msg in the log, followed by the full traceback. This PR changes all log.error to log.exception if it's inside a try/except block

This PR closes #382

[GhostofGoes]

LTGM, though that seems like an awful small number of logged exceptions considering the size of the codebase

[Akarys42]

Almost all log.error are outside of a try/except block, so I can't change them :)

[MarkKoz]

Thanks!