chore: fixed imports in importetherpad.ts

Author: SamTV12345

src/node/db/Pad.ts

@@ -39,7 +39,7 @@ export const cleanText = (txt:string): string => txt.replace(/\r\n/g, '\n')
     .replace(/\xa0/g, ' ');
 
 class Pad {
-  private db: DBFunctionsPromisified;
+  db: DBFunctionsPromisified;
   atext: AText;
   pool: AttributePool;
   head: number;

src/tests/backend/specs/ImportEtherpad.ts

@@ -3,10 +3,10 @@
 import {MapArrayType} from "../../../node/types/MapType";
 
 const assert = require('assert').strict;
-const authorManager = require('../../../node/db/AuthorManager');
-const db = require('../../../node/db/DB');
+import authorManager from '../../../node/db/AuthorManager';
+import db from '../../../node/db/DB';
 const importEtherpad = require('../../../node/utils/ImportEtherpad');
-const padManager = require('../../../node/db/PadManager');
+import padManager from '../../../node/db/PadManager';
 const plugins = require('../../../static/js/pluginfw/plugin_defs');
 import {randomString} from '../../../static/js/pad_utils';