try harder to verify until at least one VerifiedCopyLock is obtained

This avoids a failure where eg, we start with RecentlyVerifiedCopies
for all remotes, and so didn't do any active verification, which is
required.

Also, dedup the list of VerifiedCopies when checking if we have enough,
in case 2 copies of a UUID slip in.

0 files changed, 0 insertions, 0 deletions