Ensure actuator works without Spring MVC

Update MetricFilterAutoConfiguration to ensure that it is only applied
if Spring MVC is on the classpath.

Fixes gh-2542

Author: philwebb

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/autoconfigure/MetricFilterAutoConfiguration.java

@@ -53,7 +53,7 @@
 @Configuration
 @ConditionalOnBean({ CounterService.class, GaugeService.class })
 @ConditionalOnClass({ Servlet.class, ServletRegistration.class,
-		OncePerRequestFilter.class })
+		OncePerRequestFilter.class, HandlerMapping.class })
 @AutoConfigureAfter(MetricRepositoryAutoConfiguration.class)
 public class MetricFilterAutoConfiguration {
 

spring-boot-samples/spring-boot-sample-jersey/pom.xml

@@ -25,6 +25,10 @@
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-jersey</artifactId>
 		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-actuator</artifactId>
+		</dependency>
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-test</artifactId>