Fix locking - lock records need to be kept per factory instance not globally

Author: matthiasblaesing

ide/parsing.lucene/src/org/netbeans/modules/parsing/lucene/RecordOwnerLockFactory.java

@@ -39,7 +39,7 @@
 //@ThreadSafe
 class RecordOwnerLockFactory extends LockFactory {
 
-    private static final Set<DirectoryLockPair> lockHolder = ConcurrentHashMap.newKeySet();
+    private final Set<DirectoryLockPair> lockHolder = ConcurrentHashMap.newKeySet();
 
     RecordOwnerLockFactory() throws IOException {
         super();