@Transactional
	public List<PerfTest> deleteAll(User user) {
		List<PerfTest> perfTestList = getAll(user);
		for (PerfTest each : perfTestList) {
			each.getTags().clear();
		}
		perfTestRepository.saveAll(perfTestList);
		perfTestRepository.flush();
		perfTestRepository.deleteAll(perfTestList);
		perfTestRepository.flush();
		tagService.deleteTags(user);
		return perfTestList;
	}
Delete All PerfTests and related tags belonging to given user.

@param user user
@return deleted {@link PerfTest} list
ngrinder-controller/src/main/java/org/ngrinder/perftest/service/PerfTestService.java