Organzie imports like the rest of CSV

Author: garydgregory

src/test/java/org/apache/commons/csv/CSVDuplicateHeaderTest.java

@@ -22,6 +22,7 @@
 import java.util.List;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
+
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.Arguments;