Validate DataGrid work with dynamic attribute

[bulgakovea]

#81

It looks like the error appears due to an incorrectly saved table configuration. Need to make sure that the problem does not arise if you add dynamic attributes to the new table.

Case 1:

1. Create new project
2. Install Dynamic attributes add-on.
3. Replace table with dataGrid in the UserBrowse
4. Add <dynattr:dynamicAttributes/> into user-browse.xml facets and xmlns:dynattr="http://jmix.io/schema/dynattr/ui" into <window> tag.
5. Run app and create dynamic attribute for the User entity and apply it
6. Open and close User browse
   Expected result:
   Browser opened and closed without any exception. Dynamic attributes are displayed in the table

Case 2:

1. Open project trdynattr.zip from referenced ticket
2. Run app
3. Remove Dyn attr category and apply changes
4. Create same Dyn attr category and attributes for the User entity and apply it
5. Open and close User browse
   Expected result:
   Browser opened and closed without any exception. Dynamic attributes are displayed in the table