don't processEvents during rollback

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1586946 13f79535-47bb-0310-9956-ffa450edef68

lucene/core/src/java/org/apache/lucene/index/IndexWriter.java

@@ -2005,7 +2005,6 @@ public class IndexWriter implements Closeable, TwoPhaseCommit{
       mergeScheduler.close();
 
       bufferedUpdatesStream.clear();
-      processEvents(false, true);
       docWriter.close(); // mark it as closed first to prevent subsequent indexing actions/flushes 
       docWriter.abort(this); // don't sync on IW here
       synchronized(this) {