ReviewBot: get_devel_project(): correct error handling to only allow 404.

The original intent was clearly to allow 404 (package does not exist for
new packages), but crash on anything else. Instead it consumes all
exceptions and does nothing different even with the e.code condition.

ReviewBot.py

@@ -369,8 +369,8 @@ class ReviewBot(object):
             if node is not None:
                 return node.get('project'), node.get('package', None)
         except urllib2.HTTPError, e:
-            if e.code == 404:
-                pass
+            if e.code != 404:
+                raise e
         return None, None
 
     def can_accept_review(self, request_id):