Open Stack

Hi,

Declaring Exceptions in Openstack projects is quite straightforward and 
identical for most of the projects : all of them are defined in a global 
exception.py module called each time a specific exception must be handled.

I recently received a -1 for that, so I would like to come back to the 
community and ask if a global exceptions file should still be the good 
way of doing, or not.

What are your thoughts ?
-Sylvain