update format for FieldTest.java

Author: charlesliqlogic

google-cloud-clients/google-cloud-bigquery/src/test/java/com/google/cloud/bigquery/FieldTest.java

@@ -18,12 +18,12 @@
 
 import static org.junit.Assert.assertEquals;
 
-import org.junit.Test;
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.InputStream;
 import java.io.ObjectInputStream;
 import java.io.ObjectOutputStream;
+import org.junit.Test;
 
 public class FieldTest {