Consistent whitespace after imports

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

spring-messaging/src/test/java/org/springframework/messaging/handler/annotation/support/AnnotationExceptionHandlerMethodResolverTests.java

@@ -28,7 +28,6 @@ import org.springframework.util.ClassUtils;
 
 import static org.junit.Assert.*;
 
-
 /**
  * Test fixture for {@link AnnotationExceptionHandlerMethodResolver} tests.
  *

spring-messaging/src/test/java/org/springframework/messaging/handler/annotation/support/HeaderMethodArgumentResolverTests.java

@@ -31,7 +31,6 @@ import org.springframework.messaging.support.MessageBuilder;
 
 import static org.junit.Assert.*;
 
-
 /**
  * Test fixture for {@link HeaderMethodArgumentResolver} tests.
  *

spring-messaging/src/test/java/org/springframework/messaging/handler/annotation/support/HeadersMethodArgumentResolverTests.java

@@ -32,7 +32,6 @@ import org.springframework.messaging.support.NativeMessageHeaderAccessor;
 
 import static org.junit.Assert.*;
 
-
 /**
  * Test fixture for {@link HeadersMethodArgumentResolver} tests.
  *

spring-messaging/src/test/java/org/springframework/messaging/handler/annotation/support/PayloadArgumentResolverTests.java

@@ -29,7 +29,6 @@ import org.springframework.messaging.support.converter.StringMessageConverter;
 
 import static org.junit.Assert.*;
 
-
 /**
  * Test fixture for {@link PayloadArgumentResolver}.
  *

spring-messaging/src/test/java/org/springframework/messaging/simp/TestPrincipal.java

@@ -18,7 +18,6 @@ package org.springframework.messaging.simp;
 
 import java.security.Principal;
 
-
 /**
  * An implementation of {@link Principal} for testing.
  *

spring-messaging/src/test/java/org/springframework/messaging/simp/annotation/support/SendToMethodReturnValueHandlerTests.java

@@ -41,7 +41,6 @@ import static org.junit.Assert.*;
 import static org.mockito.Matchers.*;
 import static org.mockito.Mockito.*;
 
-
 /**
  * Test fixture for {@link SendToMethodReturnValueHandlerTests}.
  *

spring-messaging/src/test/java/org/springframework/messaging/simp/annotation/support/SubscriptionMethodReturnValueHandlerTests.java

@@ -40,7 +40,6 @@ import static org.junit.Assert.*;
 import static org.mockito.Matchers.*;
 import static org.mockito.Mockito.*;
 
-
 /**
  * Test fixture for {@link SubscriptionMethodReturnValueHandler}.
  *

spring-messaging/src/test/java/org/springframework/messaging/simp/config/MessageBrokerConfigurationTests.java

@@ -51,7 +51,6 @@ import java.util.List;
 
 import static org.junit.Assert.*;
 
-
 /**
  * Test fixture for {@link AbstractMessageBrokerConfiguration}.
  *

spring-messaging/src/test/java/org/springframework/messaging/simp/handler/DefaultSubscriptionRegistryTests.java

@@ -30,7 +30,6 @@ import org.springframework.util.MultiValueMap;
 
 import static org.junit.Assert.*;
 
-
 /**
  * Test fixture for {@link DefaultSubscriptionRegistry}.
  *

spring-messaging/src/test/java/org/springframework/messaging/simp/handler/DefaultUserSessionRegistryTests.java

@@ -25,7 +25,6 @@ import org.junit.Test;
 
 import static org.junit.Assert.*;
 
-
 /**
  * Test fixture for {@link DefaultUserSessionRegistry}
  *

spring-messaging/src/test/java/org/springframework/messaging/simp/handler/SimpAnnotationMethodMessageHandlerTests.java

@@ -39,7 +39,6 @@ import org.springframework.stereotype.Controller;
 
 import static org.junit.Assert.*;
 
-
 /**
  * Test fixture for {@link SimpAnnotationMethodMessageHandler}.
  * @author Rossen Stoyanchev

spring-messaging/src/test/java/org/springframework/messaging/simp/handler/SimpleBrokerMessageHandlerTests.java

@@ -33,7 +33,6 @@ import org.springframework.messaging.support.MessageBuilder;
 import static org.junit.Assert.*;
 import static org.mockito.Mockito.*;
 
-
 /**
  *
  * @author Rossen Stoyanchev

spring-messaging/src/test/java/org/springframework/messaging/simp/stomp/StompCodecTests.java

@@ -31,7 +31,6 @@ import reactor.io.Buffer;
 
 import static org.junit.Assert.*;
 
-
 /**
  * Test fixture for {@link StompCodec}.
  *

spring-messaging/src/test/java/org/springframework/messaging/simp/stomp/StompHeaderAccessorTests.java

@@ -30,7 +30,6 @@ import org.springframework.util.MultiValueMap;
 
 import static org.junit.Assert.*;
 
-
 /**
  * Test fixture for {@link StompHeaderAccessor}.
  *

spring-messaging/src/test/java/org/springframework/messaging/support/MessageBuilderTests.java

@@ -27,7 +27,6 @@ import org.springframework.messaging.MessageHeaders;
 
 import static org.junit.Assert.*;
 
-
 /**
  * @author Mark Fisher
  */

spring-messaging/src/test/java/org/springframework/messaging/support/MessageHeaderAccessorTests.java

@@ -25,7 +25,6 @@ import org.springframework.messaging.MessageHeaders;
 
 import static org.junit.Assert.*;
 
-
 /**
  * Test fixture for {@link MessageHeaderAccessor}.
  *

spring-messaging/src/test/java/org/springframework/messaging/support/NativeMessageHeaderAccessorTests.java

@@ -30,7 +30,6 @@ import org.springframework.util.MultiValueMap;
 
 import static org.junit.Assert.*;
 
-
 /**
  * Test fixture for {@link NativeMessageHeaderAccessor}.
  *

spring-messaging/src/test/java/org/springframework/messaging/support/converter/AbstractMessageConverterTests.java

@@ -31,7 +31,6 @@ import org.springframework.util.MimeTypeUtils;
 
 import static org.junit.Assert.*;
 
-
 /**
  * Test fixture for {@link AbstractMessageConverter}.
  *

spring-messaging/src/test/java/org/springframework/messaging/support/converter/DefaultContentTypeResolverTests.java

@@ -27,7 +27,6 @@ import org.springframework.util.MimeTypeUtils;
 
 import static org.junit.Assert.*;
 
-
 /**
  * Test fixture for {@link DefaultContentTypeResolver}.
  *

spring-messaging/src/test/java/org/springframework/messaging/support/converter/MappingJackson2MessageConverterTests.java

@@ -31,7 +31,6 @@ import org.springframework.util.MimeType;
 
 import static org.junit.Assert.*;
 
-
 /**
  * Test fixture for {@link MappingJackson2MessageConverter}.
  *

spring-messaging/src/test/java/org/springframework/messaging/support/converter/StringMessageConverterTests.java

@@ -30,7 +30,6 @@ import org.springframework.util.MimeTypeUtils;
 
 import static org.junit.Assert.*;
 
-
 /**
  * Test fixture for {@link StringMessageConverter}.
  *