rebaseline_server: stop catching KeyboardInterrupt (ctrl-C)

gm/rebaseline_server/imagediffdb.py

 #!/usr/bin/python
 
 """
 Copyright 2013 Google Inc.
 
 Use of this source code is governed by a BSD-style license that can be
 found in the LICENSE file.
 
 Calulate differences between image pairs, and store them in a database.
 """
@@ skipping 156 matching lines @@
     """
     key = (expected_image_locator, actual_image_locator)
     if not key in self._diff_dict:
       try:
         new_diff_record = DiffRecord(
             self._storage_root,
             expected_image_url=expected_image_url,
             expected_image_locator=expected_image_locator,
             actual_image_url=actual_image_url,
             actual_image_locator=actual_image_locator)
-      except:
+      except Exception:
         logging.exception('got exception while creating new DiffRecord')
         return
       self._diff_dict[key] = new_diff_record
 
   def get_diff_record(self, expected_image_locator, actual_image_locator):
     """Returns the DiffRecord for this image pair.
 
     Raises a KeyError if we don't have a DiffRecord for this image pair.
     """
     key = (expected_image_locator, actual_image_locator)
@@ skipping 130 matching lines @@
   and actual_image.
 
   Args:
     expected_image_locator: locator string pointing at expected image
     actual_image_locator: locator string pointing at actual image
 
   Returns: locator where the diffs between expected and actual images can be
       found
   """
   return "%s-vs-%s" % (expected_image_locator, actual_image_locator)