Replace React.createClass with create-react-class

Summary:
This replaces all uses of `React.createClass` with `createReactClass` from the `create-react-class` package, attempting to match use of `var` and `const` according to local style.

Fixes #14620
Refs #14712
Closes https://github.com/facebook/react-native/pull/14729

Differential Revision: D5321810

Pulled By: hramos

fbshipit-source-id: ae7b40640b2773fd89c3fb727ec87f688bebf585

Libraries/Components/ProgressBarAndroid/ProgressBarAndroid.android.js

@@ -16,6 +16,7 @@ var PropTypes = require('prop-types');
 var ViewPropTypes = require('ViewPropTypes');
 var ColorPropType = require('ColorPropType');
 
+var createReactClass = require('create-react-class');
 var requireNativeComponent = require('requireNativeComponent');
 
 var STYLE_ATTRIBUTES = [
@@ -63,7 +64,8 @@ var indeterminateType = function(props, propName, componentName, ...rest) {
  * },
  * ```
  */
-var ProgressBarAndroid = React.createClass({
+var ProgressBarAndroid = createReactClass({
+  displayName: 'ProgressBarAndroid',
   propTypes: {
     ...ViewPropTypes,
     /**