Recreate model update issue

[maciejszklarczyk]

Example code related to https://github.com/in2code-de/femanager/issues/462

Steps:

• Update database and create at least one ExampleModel via backend list module
• In backend, attach created ExampleModel to frontend user
• Set up femanager edit plugin with only email and exampleModel fields
• While logged as previously updated user go to edit plugin and submit form.

Expected error:

In2code\Femanager\Utility\ObjectUtility::implodeObjectStorageOnProperty(): Argument #1 ($objectStorage) must be of type TYPO3\CMS\Extbase\Persistence\ObjectStorage, In2code\Femanagerextended\Domain\Model\ExampleModel given, called in /var/www/html/public/typo3conf/ext/femanager/Classes/Utility/UserUtility.php on line 263