merge changes from d1 indexing lib
subclass AnnotatorSubprocessor for use in metacat-index (uses embedded solr server and solrj for retrieving/merging existing documents).
merge CN annotation context files to metacat (MN) to support semantic index fields.
add fieldsToMerge property for annotation updates
update classes and context files that use cn-index-processor classes. allowing document subprocessors to be less tied to XML.
use sparql field and triple store from cn-index_processor (refactor). include annotatorSubprocessor for testing in metacat-index
let metacat-index lookup annotations for indexing rather than the metacat "reindex" action.