Merge pull request #464 from bowlofeggs/flake8-E722

Convert a bare except to make flake8 E722 pass.

cornice/service.py

@@ -494,7 +494,7 @@ def wrapper(request):
                     response = view_()
                 else:
                     response = view_(request)
-            except:
+            except Exception:
                 # cors headers need to be set if an exception was raised
                 request.info['cors_checked'] = False
                 raise