[jvstm-lf] Cleanup CommitRequest before extracting superclass
[jvstm-lf] Use DeltaCommitRequest to save bandwidth on retries
[jvstm-lf] Measure resend round-trip time
[jvstm-lf] Send only new benign commits in DeltaCommitRequest
[jvstm-lf] Improve list of benign: send only NEW deltas and don't skip any entry in CommitRequests queue.
[jvstm-lf] Minor optimization when computing UUID.toString often
[jvstm-lf] Only committer thread writes mapping txVersion->commitId