Copyright notice added

h2/src/main/org/h2/mvstore/tx/TransactionMap.java

+/*
+ * Copyright 2004-2018 H2 Group. Multiple-Licensed under the MPL 2.0,
+ * and the EPL 1.0 (http://h2database.com/html/license.html).
+ * Initial Developer: H2 Group
+ */
 package org.h2.mvstore.tx;
 
 import org.h2.mvstore.Cursor;

h2/src/main/org/h2/mvstore/tx/VersionedValue.java

+/*
+ * Copyright 2004-2018 H2 Group. Multiple-Licensed under the MPL 2.0,
+ * and the EPL 1.0 (http://h2database.com/html/license.html).
+ * Initial Developer: H2 Group
+ */
 package org.h2.mvstore.tx;
 
 import org.h2.mvstore.DataUtils;