Expose ImportError when trying to import config modules #19
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raise-ing a utils.ErrorMessage hides the details of the underlying exception without --debug
As a user, I'd like a little more information about what has gone wrong when my tool has a critical failure like this - I don't want to have to re-run it (which could be nontrivial)
I appreciate using debug logging for otherwise-overly-verbose information that might help me understand internal behaviour better, but for fundamental failures like "your config file is so broken that the tool won't run", I want useful information alongside the failure.