Consistent whitespace after imports

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

spring-test/src/test/java/org/springframework/test/util/JsonPathExpectationsHelperTests.java

@@ -21,7 +21,6 @@ import static org.junit.Assert.fail;
 
 import org.junit.Test;
 
-
 /**
  * Test fixture for {@link JsonPathExpectationsHelper}.
  *

spring-test/src/test/java/org/springframework/test/web/client/samples/matchers/XmlContentRequestMatcherTests.java

@@ -39,7 +39,6 @@ import org.springframework.test.web.Person;
 import org.springframework.test.web.client.MockRestServiceServer;
 import org.springframework.web.client.RestTemplate;
 
-
 /**
  * Examples of defining expectations on XML request content with XMLUnit.
  *

spring-test/src/test/java/org/springframework/test/web/servlet/samples/context/JavaConfigTests.java

@@ -49,7 +49,6 @@ import static org.springframework.test.web.servlet.request.MockMvcRequestBuilder
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.*;
 import static org.mockito.Mockito.*;
 
-
 /**
  * Tests with Java configuration.
  *

spring-test/src/test/java/org/springframework/test/web/servlet/setup/StandaloneMockMvcBuilderTests.java

@@ -27,7 +27,6 @@ import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandl
 
 import static org.junit.Assert.*;
 
-
 /**
  * @author Rossen Stoyanchev
  */