Test job manager throws exception for invalid jobs
Test Job#getId() method
Add tests for WorkerEvent
Add test to inject payload with queue plugin
Test an exception is thrown when no queue is set
Replace stub by real objects
Remove mock from WorkerEvent test class
Add tests for stop signals
Test worker skips job loop when NULL is returned
Merge pull request #107 from juriansluiman/feature/increase-test-coverage

Increase test coverage