Add spring.*.enabled for MVC view resolvers

Since we use a composite ViewResolver glbally by default it can be
awkward to switch off the view technology that you have on the classpath
but aren't actually using.

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/groovy/template/GroovyTemplateAutoConfigurationTests.java

@@ -38,6 +38,7 @@ import org.springframework.mock.web.MockHttpServletResponse;
 import org.springframework.mock.web.MockServletContext;
 import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
 import org.springframework.web.servlet.View;
+import org.springframework.web.servlet.ViewResolver;
 import org.springframework.web.servlet.support.RequestContext;
 import org.springframework.web.servlet.view.groovy.GroovyMarkupConfig;
 import org.springframework.web.servlet.view.groovy.GroovyMarkupViewResolver;
@@ -100,6 +101,15 @@ public class GroovyTemplateAutoConfigurationTests {
 		assertThat(response.getContentType(), equalTo("text/html;charset=UTF-8"));
 	}
 
+	@Test
+	public void disableViewResolution() throws Exception {
+		EnvironmentTestUtils.addEnvironment(this.context,
+				"spring.groovy.template.enabled:false");
+		registerAndRefreshContext();
+		assertThat(this.context.getBeanNamesForType(ViewResolver.class).length,
+				equalTo(0));
+	}
+
 	@Test
 	public void localeViewResolution() throws Exception {
 		registerAndRefreshContext();