Consistent whitespace after imports

Update code to have a consistent number of new-line characters after
import statements.

spring-core/src/test/java/org/springframework/core/SerializableTypeWrapperTests.java

@@ -35,7 +35,6 @@ import org.junit.Test;
 import static org.hamcrest.Matchers.*;
 import static org.junit.Assert.*;
 
-
 /**
  * Tests for {@link SerializableTypeWrapper}.
  *

spring-core/src/test/java/org/springframework/core/StandardReflectionParameterNameDiscoverTests.java

@@ -24,7 +24,6 @@ import java.lang.reflect.Method;
 import static org.hamcrest.CoreMatchers.is;
 import static org.hamcrest.MatcherAssert.assertThat;
 
-
 /**
  * Tests for StandardReflectionParameterNameDiscoverer
  *

spring-core/src/test/java/org/springframework/core/env/StandardEnvironmentTests.java

@@ -28,7 +28,6 @@ import java.util.Map;
 import org.junit.Test;
 import org.springframework.mock.env.MockPropertySource;
 
-
 import static java.lang.String.*;
 import static org.hamcrest.Matchers.*;
 import static org.junit.Assert.*;

spring-core/src/test/java/org/springframework/tests/sample/objects/GenericObject.java

@@ -20,7 +20,6 @@ import java.util.List;
 
 import org.springframework.core.io.Resource;
 
-
 public class GenericObject<T> {
 
 	private List<Resource> resourceList;

spring-core/src/test/java/org/springframework/util/MimeTypeTests.java

@@ -28,7 +28,6 @@ import org.springframework.core.convert.support.DefaultConversionService;
 
 import static org.junit.Assert.*;
 
-
 /**
  * @author Arjen Poutsma
  * @author Juergen Hoeller