Add displayName so that ActionButtonCell can be referenced in tests

awx/ui_next/src/components/ActionButtonCell/ActionButtonCell.jsx

@@ -1,6 +1,7 @@
 import DataListCell from '@components/DataListCell';
 import styled from 'styled-components';
 
+DataListCell.displayName = 'ActionButtonCell';
 export default styled(DataListCell)`
   & > :not(:first-child) {
     margin-left: 20px;