Use notify_or_ignore for the hoptoad failure backend

Hoptoad can be configured with a set of exceptions to ignore. However, those exceptions are not
ignored when using Hoptoad.notify alone; Hoptoad.notify_or_ignore must be used.

Author: raykrueger

lib/resque/failure/hoptoad.rb

@@ -27,7 +27,7 @@ def self.count
       end
 
       def save
-        HoptoadNotifier.notify(exception,
+        HoptoadNotifier.notify_or_ignore(exception,
           :parameters => {
             :payload_class => payload['class'].to_s,
             :payload_args => payload['args'].inspect