refactor: update columns function for image

update getColumns function for image, then other class can better update the columns by inheritance class

Change-Id: I8c5387b4e03edfb5f94764a7bb7c60759962871e

src/pages/compute/containers/Image/Image.jsx

@@ -117,7 +117,8 @@ export class Image extends Base {
     return 'owner';
   }
 
-  getColumns = () => [
+  getColumns() {
+    return [
       {
         title: t('ID/Name'),
         dataIndex: 'name',
@@ -186,6 +187,7 @@ export class Image extends Base {
         valueRender: 'sinceTime',
       },
     ];
+  }
 
   get searchFilters() {
     const filters = [