fix QueueClassic integration to work with QC3

QueueClassic 3 has been in the work for a while and is now getting closer to release and some people even run it in production. This is fixing hirefire-resource to work well with QC3 and it should also work with 2.2.3 which is the latest stable release.


QC::Queue as of 2.2.3: https://github.com/ryandotsmith/queue_classic/blob/v2.2.3/lib/queue_classic/queue.rb

Thanks!