DrillSidewaysScorer NPE if drill-down terms were not found

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1491809 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5050: Close the stored fields and term vectors index files eagerly.


git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1491889 13f79535-47bb-0310-9956-ffa450edef68
remove unnecessary code

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1491956 13f79535-47bb-0310-9956-ffa450edef68
SOLR-4792: Skip target '-validate-maven-dependencies' in solr/webapp/

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1491970 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5047: Handle NoSuchFileException of Java 7 like FileNotFoundException when opeining index files; document this in Directory.

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1491992 13f79535-47bb-0310-9956-ffa450edef68