Regression: ACE Importer does not work correctly into shared database

Regression started 1.29.0 release after fix Ugene-5818
ACE Importer does not work correctly when import performed in the shared database

Try to import an ACE file via import dialog as assembly.

1. Connect to the "ugene_gui_test" database and select it.
2. Add "import_test_0017" from context menu: Add->Add folder
3. Select folder and call Add -> Import to the folder... item from context menu
4. Click the "Add files" button, select the "_common_data/ace/ace_test_2.ace" file.
5. Click a "General options" button and set a specific option:
Import ACE files as: Short reads assembly;
6. Click the "Import" button.

Expected state: an import task is started, there are two assembly objects and two sequence objects in the

folder after the task has finished.
Actual state: Objects are created in the root directory while folder "import_test_0017" is empty

Affected tests:
GUITest_common_scenarios_shared_database_import_test_0017