Fixing file naming convention issue, use underbar instead of hyphen for files under /lib dir

Author: kenny-y

lib/message-translator.js lib/message_translator.jslib/message-translator.js renamed to lib/message_translator.js

@@ -14,7 +14,7 @@
 
 'use strict';
 
-const debug = require('debug')('rclnodejs:message-translator');
+const debug = require('debug')('rclnodejs:message_translator');
 
 /* eslint-disable max-depth */
 function copyMsgObject(msg, obj) {

lib/publisher.js

@@ -17,7 +17,7 @@
 const rclnodejs = require('bindings')('rclnodejs');
 const debug = require('debug')('rclnodejs:publisher');
 const Entity = require('./entity.js');
-const {MessageTranslator} = require('./message-translator.js');
+const {MessageTranslator} = require('./message_translator.js');
 
 /**
  * @class - Class representing a Publisher in ROS