calling GearmanJobResult.jobSucceeded() for a failed job incorrectly returns true

[Eric Lambert]

The Job Result created when a WORK_FAIL event is received incorrectly sets the job success value to true

            case WORK_FAIL:
                LOG.log(Level.FINER, "job " + this + " has received a work " +
                        "fail event");
                validateJobHandle(event.getDataComponentValue(
                        GearmanPacket.DataComponentName.JOB_HANDLE));
                jobResult = jobResult.addJobResult(
                        new GearmanJobResultImpl(handle, true, null, null, null,
                        -1, -1));
                isComplete = true;
                break;