Fixes the deletion of collections 500 (#6362).

[bwatson78]

Fixes

Fixes #6362

Summary

Fixes the deletion of collections 500 errors.

Guidance for testing, such as acceptance criteria or new user interface behaviors:

Pre-req: create a collection or have manager access to a collection

• In valkyrie/fedora (sirenia), log in and navigate to Dashboard -> Collections
• Click on the title of a collection
• Click "Delete Collection"
• Click "OK"
• No errors should occur. Collection should be removed in all possible storage locations.

Type of change (for release notes)

• notes-bugfix Bug Fixes
• notes-valkyrie Valkyrie Progress

Detailed Description

The objects being queried are missing from their stores when we attempt to eliminate their children. This causes errors that redirects the user to the edit page of an object that no longer exists. This PR pulls the objects to remove first, deletes second.

Changes proposed in this pull request:

• Retrieves the object child members before deleting the objects from their respective stores.
• Passes along a members variable that contains the intended FileSets or Works.
• Switches the order of deletion to ACL first, Work second.

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