JCMA fails to migrate filters owned by inactive users

Issue Summary

JCMA fails to migrate filters owned by inactive users. The error is misleading as it will indicate that the owned by an inactive user is a Cross-project filter

Unsupported	CAP	Board	"FILTER_NAME" [985]	Cross-project board	Boards that reference multiple projects are not supported via migration. This board will not be migrated.	If you require this board, re-create the board in your cloud site. To pull out the JQL for board filters, run SQL queries from this page: https://confluence.atlassian.com/jirakb/troubleshooting-errors-and-non-migrated-entities-with-the-jira-cloud-migration-assistant-1021239878.html

Steps to Reproduce

1. have a filter that is owned by an inactive user
2. try to migrate the project that has a board associated with that filter

Expected Results

JCMA should migrate that project and filters

Actual Results

JCMA finishes, but the Post Migration will complain about the Cross-project board Boards that reference multiple projects are not supported via migration and the particular project will not migrate

Workaround

Make sure to associate the filters with active users