- Modified unlock method to have it delete 'commit.lock' with as well.

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git-svn-id: https://svn.apache.org/repos/asf/lucene/java/trunk@149635 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/lucene/index/IndexReader.java

@@ -274,5 +274,6 @@ abstract public class IndexReader {
     */
     public static void unlock(Directory directory) throws IOException {
 	directory.deleteFile("write.lock");
+	directory.deleteFile("commit.lock");
     }
 }