This patch addresses issue #155. It register an exception handler
API of the routes object that handle the no_such_keyspace exception.
The handler just throw a bad_parameter_exception with the error message
it got from the no_such_keyspace exception.
After this patch a call with a keyspace that does not exist, will return
a 400 result.
Signed-off-by: Amnon Heiman <amnon@cloudius-systems.com>
a825977f85