Bug: spindle set wrong user as repo collaborator #341

reproduce steps:

1. create repo A from account Foo
2. add collaborator Bar to repo A
3. create repo B from account Foo
4. set spindle to repo B
5. spindle internally adds Bar as collaborator of repo B

You can check this with following query in spindle db.

select * from acl where v0 = 'did:plc:bar' and v3 = 'repo:collaborator';

Current spindle ingester will add all collaborators defined by the repo owner to any registered repos owned by same account.