Record Grouping Updates

Remove additional common subtitles
Improvements for handling overdrive author normalization
Change the order of marc tags that we use when loading authors from MARC
for better normalization
Normalize & to and when setting titles for grouped works
Reduce importance of OverDrive popularity since it is not just past year
for Marmot libraries.
Improve the display of Solr Scores while debugging to also include
explanation details (in popup)
Allow solr debugging to only emit solr scores, not query data (with new
debugSolrQuery config option)
Change relevance to sum boost factors rather than multiply them to
reduce the overall scores
Record Grouping Fixes

Updates to normalization of OverDrive authors
Allow debugging of scores and explanation info for Solr without
debugging the queries
Remove additional common subtitles
Change the order we load authors for grouping from MARC files
Normalize & to and when indexing titles for solr
Reduce popularity of overdrive records when grouping
Change relevance to sum rather than multiply factors