Integrate animal sniffer

Animal sniffer provides tools to assist verifying that classes
compiled with a newer JDK are compatible with an older JDK.

This integratesthe latest version of the tool (1.11) that
permits the use of custom annotations. Added @UsesJava7,
@UsesJava8 and @UsesSunHttpServer and annotated the few places
where we rely on a specific environment.

The verification process can be invoked by running the 'sniff'
task.

Issue: SPR-11604

polishing

spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/annotation/ServletRequestMethodArgumentResolver.java

@@ -27,6 +27,7 @@ import javax.servlet.ServletRequest;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpSession;
 
+import org.springframework.core.UsesJava8;
 import org.springframework.core.MethodParameter;
 import org.springframework.http.HttpMethod;
 import org.springframework.web.bind.support.WebDataBinderFactory;
@@ -133,6 +134,7 @@ public class ServletRequestMethodArgumentResolver implements HandlerMethodArgume
 	/**
 	 * Inner class to avoid a hard-coded dependency on Java 8's {@link java.time.ZoneId}.
 	 */
+	@UsesJava8
 	private static class ZoneIdResolver {
 
 		public static Object resolveZoneId(HttpServletRequest request) {