OAK-2168 - added AdvancedSolrQueryIndex, abstracted query parsing of Filters in FilterQueryParser

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1646766 13f79535-47bb-0310-9956-ffa450edef68
Merge branch 'upstream-trunk' into OAK-2370