QueueIntegrationTest#providesAccessToJobCounts() now passes.
QueueIntegrationTest#exposesMaxConcurrency() now passes.
QueueIntegrationTest#exposesQueueStatistics() now passes.
QueueIntegrationTest#providesAccessToHeartbeatConfiguration() now passes.
QueueIntegrationTest#canPauseAndUnpauseItself() now passes.
QueueIntegrationTest#providesAccessToJobsInDifferentStates() now passes.
All tests in QueueIntegrationTest now pass.