private String filterHostString(String originalString) {
		List<String> hosts = newArrayList();
		for (String each : StringUtils.split(StringUtils.trimToEmpty(originalString), ",")) {
			if (!each.contains("please_modify_this.com")) {
				hosts.add(each);
			}
		}
		return StringUtils.join(hosts, ",");
	}
Filter out please_modify_this.com from hosts string.

@param originalString original string
@return filtered string
ngrinder-controller/src/main/java/org/ngrinder/perftest/controller/PerfTestApiController.java