private boolean isSupportedRegion(Member member, String region) {
		return member.getAttributes().containsKey(REGION_ATTR_KEY) && region.equals(member.getAttributes().get(REGION_ATTR_KEY));
	}
For support data clustering using hazelcast instance.

@since 3.5.0
ngrinder-controller/src/main/java/org/ngrinder/infra/hazelcast/HazelcastService.java