@Transactional
	public PerfTest markAbnormalTermination(PerfTest perfTest, StopReason reason) {
		return markAbnormalTermination(perfTest, reason.getDisplay());
	}
Mark test error on {@link PerfTest} instance.

@param perfTest {@link PerfTest}
@param reason   stop reason
@return perftest with updated data
ngrinder-controller/src/main/java/org/ngrinder/perftest/service/PerfTestService.java