Move Encoding hint to converter level

See gh-178

Author: sdeleuze

spring-graalvm-native-configuration/src/main/java/org/springframework/boot/autoconfigure/http/HttpMessageConverterHints.java

@@ -15,13 +15,14 @@
  */
 package org.springframework.boot.autoconfigure.http;
 
+import org.springframework.boot.web.servlet.server.Encoding;
 import org.springframework.graalvm.extension.NativeImageHint;
 import org.springframework.graalvm.extension.NativeImageConfiguration;
 import org.springframework.graalvm.extension.TypeInfo;
 import org.springframework.http.converter.FormHttpMessageConverter;
 
 @NativeImageHint(trigger=HttpMessageConvertersAutoConfiguration.class,typeInfos= {
-	@TypeInfo(types= {HttpMessageConverters.class,FormHttpMessageConverter.class})	
+	@TypeInfo(types= {HttpMessageConverters.class,FormHttpMessageConverter.class, Encoding.class})
 })
 public class HttpMessageConverterHints implements NativeImageConfiguration {
 }

spring-graalvm-native-configuration/src/main/java/org/springframework/boot/autoconfigure/web/servlet/WebMvcHints.java

@@ -41,8 +41,7 @@
 				DefaultErrorViewResolver.class,
 				// TODO Maybe the first and last of these 3 needs to be in a more generic configuration hint working for both reactive and servlet
 				ConfigurableWebApplicationContext.class,TomcatEmbeddedWebappClassLoader.class,WebApplicationContext.class,
-				ErrorPage.class,DefaultErrorViewResolver.class,BeanNameViewResolver.class,  ErrorPageRegistrarBeanPostProcessor.class,
-				Encoding.class},
+				ErrorPage.class,DefaultErrorViewResolver.class,BeanNameViewResolver.class,  ErrorPageRegistrarBeanPostProcessor.class},
 				typeNames= {"org.springframework.web.servlet.handler.AbstractHandlerMethodMapping$EmptyHandler"}),
 		@TypeInfo(types= {Callable.class},access=AccessBits.CLASS|AccessBits.DECLARED_METHODS|AccessBits.DECLARED_CONSTRUCTORS)},abortIfTypesMissing = true)
 // TODO this is an interesting one as it is hinted at by both flavours of BeanPostProcessorsRegistrar (reactive and servlet)