Increase the size of the katello_event_queue
Description of problem:
Currently the katello event queue in qpidd is using the default queue size which is too small. We should increase this to be able to handle ~1 million messages.
This is only to prevent the standard flow of messages from causing QPID to start putting Candlepin into an error state due to the qpid putting the qpid sender into a flow_stopped state.