Switch to createReactClass: views/rooms and test/components. React 16 :D

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

src/components/views/rooms/RoomTopicEditor.js

@@ -14,14 +14,13 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-'use strict';
-
-const React = require('react');
+import React from 'react';
 import PropTypes from 'prop-types';
-const sdk = require('../../../index');
+import createReactClass from 'create-react-class';
+import sdk from '../../../index';
 import { _t } from "../../../languageHandler";
 
-module.exports = React.createClass({
+module.exports = createReactClass({
     displayName: 'RoomTopicEditor',
 
     propTypes: {