WPScan deduplication does not work

[manuel-sommer]

Summary:
WpScan duplicates are not removed eventhough deduplication is active.

Bug description
Deduplication is not working for WPScan

Steps to reproduce

1. Activate deduplication on DefectDojo
2. Use WPScan to scan a vulnerable Wordpress page and upload the results multiple times to the same engagement.
3. Findings are not deduplicated.

Expected behavior
Findings are deduplicated.

Deployment method (select with an X)
Docker Compose

Environment information
Operating System: Ubuntu 18.04
DefectDojo version v. 2.13.1

[quirinziessler]

Bug also exists at v2.15.1