BitBucket Server import only imports the first 25 pull requests
Summary
When importing a project from Stash (BitBucket Server), only the first 25 pull requests are imported.
Steps to reproduce
Import a Stash project with more than 25 pull requests or issues to Gitlab. Only the most recent 25 pull requests appear after the import.
Possible fixes
This commit (!22825 (merged) from #50021 (moved)) appears to have broken the pagination of API results gathered by get_collection. I've temporarily worked around the issue by deleting the line containing the over_limit? check.