Rename querystream.js to match camelCase names of other files

Author: cjbj

lib/connection.js

@@ -21,7 +21,7 @@
 
 const BaseDbObject = require('./dbObject.js');
 const EventEmitter = require('events');
-const QueryStream = require('./querystream.js');
+const QueryStream = require('./queryStream.js');
 const nodbUtil = require('./util.js');
 const util = require('util');
 

lib/querystream.js renamed to lib/queryStream.js

@@ -19,7 +19,7 @@
 
 'use strict';
 
-const QueryStream = require('./querystream.js');
+const QueryStream = require('./queryStream.js');
 const nodbUtil = require('./util.js');
 
 // close the result set