Steps to reproduce
1. Take a 6.1.30 bundle.
2. Create a DDL definition and put a File Upload field on it.
3. Create a DDL list based on this definition and add a record uploading a file. (e.g.: file.txt)
4. Upgrade this bundle to 6.2.10.
5. Check the title attribute of dlfileentry table.
Result: title is "file".
Expected: title is "file.txt".
6.2.x commit: 2560ca5ebaed683f3173b12d7fb7076f566a9f87
reproduced (Cannot be tested without
master commit: 2ce54ae99a115376d0066da7e121197c559cff94
fixed (The logic was moved from VerifyDynamicDataMapping.addFileEntry to UpgradeDynamicDataMapping.addDLFileEntry without the erroneous part.)