Add default ViewResolver to MVC Java config

Since the MVC Java config always registers a ViewResolver (composite)
bean, at a very minimum we must add an InternalResourceViewResolver
consistent with default DispatcherServlet configuration and by
extension with the MVC namespace which falls back on DispatcherServlet
implicity if no <view-resolvers> element is present.

Issue: SPR-7093

spring-webmvc/src/test/java/org/springframework/web/servlet/config/annotation/WebMvcConfigurationSupportTests.java

@@ -49,6 +49,7 @@ import org.springframework.web.method.support.CompositeUriComponentsContributor;
 import org.springframework.web.servlet.HandlerExceptionResolver;
 import org.springframework.web.servlet.HandlerExecutionChain;
 import org.springframework.web.servlet.ViewResolver;
+import org.springframework.web.servlet.view.InternalResourceViewResolver;
 import org.springframework.web.servlet.view.ViewResolverComposite;
 import org.springframework.web.servlet.handler.AbstractHandlerMapping;
 import org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping;
@@ -208,7 +209,8 @@ public class WebMvcConfigurationSupportTests {
 		ViewResolverComposite compositeResolver = this.wac.getBean(ViewResolverComposite.class);
 		assertEquals(Ordered.LOWEST_PRECEDENCE, compositeResolver.getOrder());
 		List<ViewResolver> resolvers = compositeResolver.getViewResolvers();
-		assertEquals(0, resolvers.size());
+		assertEquals(1, resolvers.size());
+		assertEquals(InternalResourceViewResolver.class, resolvers.get(0).getClass());
 	}
 
 	@Test