Add better logging when failing to load a test.

pylintrc

 # Copyright 2014 Google Inc. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
 #    http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
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 ignore-comments=yes
 
 # Ignore docstrings when computing similarities.
 ignore-docstrings=yes
 
 
 [FORMAT]
 
 # Maximum number of characters on a single line.
 # max-line-length=200
+max-line-length=80
 
 # Maximum number of lines in a module
 # max-module-lines=1000
 
 # String used as indentation unit. This is usually " " (4 spaces) or "\t" (1
 # tab).
 # CHANGED:
 indent-string='    '
 
 
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 # Create a graph of internal dependencies in the given file (report RP0402 must
 # not be disabled)
 int-import-graph=
 
 
 [EXCEPTIONS]
 
 # Exceptions that will emit a warning when being caught. Defaults to
 # "Exception"
 overgeneral-exceptions=Exception