Fixed #5531 -- Changes a while back meant we are handling import errors from database backends differently now. Which meant the MySQLdb version check was being swallowed. Changed the exception type to ensure this is percolated correctly. Patch from Ramiro Morales.
Fixed #5531 -- Changes a while back meant we are handling import errors from
database backends differently now. Which meant the MySQLdb version check was
being swallowed. Changed the exception type to ensure this is percolated
correctly. Patch from Ramiro Morales.

--HG--
extra : convert_revision : svn%3Abcc190cf-cafb-0310-a4f2-bffc1f526a37/django/trunk%407358

adieu/django-nonrel,adieu/django-nonrel,adieu/django-nonrel