New test for EZP-23288: Allow to set modifier of Content Versions & ContentType

#### New test for EZP-23288: Allow to set modifier of Content Versions & ContentType

This test a new user is create, inside Administrator User Group, and creates a new draft for a ContentType https://jira.ez.no/browse/EZP-23288
For reference:

1) eZ\Publish\API\Repository\Tests\ContentTypeServiceTest::testAllowModifiderContentType
eZ\Publish\Core\Base\Exceptions\NotFoundException: Could not find 'ContentType owned by someone else' with identifier '36'
/home/travis/build/ezsystems/ezpublish-kernel/eZ/Publish/Core/Repository/ContentTypeService.php:1323
/home/travis/build/ezsystems/ezpublish-kernel/eZ/Publish/Core/Repository/ContentTypeService.php:1879
/home/travis/build/ezsystems/ezpublish-kernel/eZ/Publish/Core/SignalSlot/ContentTypeService.php:494
/home/travis/build/ezsystems/ezpublish-kernel/eZ/Publish/API/Repository/Tests/ContentTypeServiceTest.php:2688