LUCENE-6140: simplify inflater usage in CompressionMode

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1648224 13f79535-47bb-0310-9956-ffa450edef68
SOLR-6876: Remove unused legacy scripts.conf

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1648246 13f79535-47bb-0310-9956-ffa450edef68