fix import for central openminds class

Author: olinux

generator/templates/OpenMINDS.java.j2

@@ -9,7 +9,6 @@ import org.openmetadatainitiative.openminds.utils.LocalId;
 import java.io.File;
 import java.io.IOException;
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.List;
 import java.util.stream.Stream;
 
@@ -80,7 +79,7 @@ public class OpenMINDS {
         {% endfor %}
 
        public void persist(String targetDirectory) {
-            OpenMINDS.persist(targetDirectory, builders.stream().map(Builder::build));
+            OpenMINDS.persist(targetDirectory, builders.stream().map(org.openmetadatainitiative.openminds.utils.Builder::build));
         }
     }