TEIID-2714 correcting defrag logic and refining the defrag/truncation
strategies
TEIID-2714 further refining defrag behavior
TEIID-2728 ensuring desired space calculation doesn't overflow
TEIID-2714 adding an option to make the buffer files more compact and
defaulting to a somewhat more conservative default
TEIID-2707 ensuring prefetch works for non-blocking sources as well