Okay, my fault. I had a misunderstanding as to under what conditions DataStax
Enterprise 2 re-indexes the content, and thus while I had the field definitions
set properly to support FVH, I believe no actual position and offset data was
generated and that might indicate why I had empty highlights
This does not appear to be shingle specific. A non-shingled field is also NOT
highlighted in the same manner with FVH. I can see in the timing information
that it takes much longer to run FVH than no highlighting at all, so Solr must
be doing something. But why it just lists the document IDs
