@Transactional
	public void deleteTags(User user) {
		Specification<Tag> spec = Specification.where(lastModifiedOrCreatedBy(user));
		List<Tag> userTags = tagRepository.findAll(spec);
		for (Tag each : userTags) {
			Set<PerfTest> perfTests = each.getPerfTests();
			if (perfTests != null) {
				for (PerfTest eachPerfTest : perfTests) {
					eachPerfTest.getTags().remove(each);
				}
				perfTestRepository.saveAll(each.getPerfTests());
			}
		}
		tagRepository.deleteAll(userTags);
	}
Delete all tags belonging to given user.

@param user	user
ngrinder-controller/src/main/java/org/ngrinder/perftest/service/TagService.java