Convert live entries to init entries in lowest level of bucketlist

[ThomasBrady]

Description

Resolves #193

Changes BucketOutputIterator::put to convert LIVEENTRY to INITENTRY in the lowest level of LiveBuckets.

Checklist

• [ ] Reviewed the contributing document
• [ ] Rebased on top of master (no merge commits)
• [ ] Ran clang-format v8.0.0 (via make format or the Visual Studio extension)
• [ ] Compiles
• [ ] Ran all tests
• [ ] If change impacts performance, include supporting evidence per the performance document

[ThomasBrady]

@SirTyson can you PTAL?

[ThomasBrady]

@SirTyson I had to rebase, can you re-enable automerge?