incorporate asaad's UI updates for google sign-up

web/react/components/signup_user_complete.jsx

@@ -164,7 +164,7 @@ module.exports = React.createClass({
 
         if (authServices.indexOf(Constants.GOOGLE_SERVICE) >= 0) {
             signupMessage.push(
-                    <a className='btn btn-custom-login gitlab' href={'/' + this.props.teamName + '/signup/google' + window.location.search}>
+                    <a className='btn btn-custom-login google' href={'/' + this.props.teamName + '/signup/google' + window.location.search}>
                         <span className='icon' />
                         <span>with Google</span>
                     </a>