Refactor sample dependencies to use starters

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

@@ -29,16 +29,8 @@
 			<artifactId>spring-boot-starter-web</artifactId>
 		</dependency>
 		<dependency>
-			<groupId>javax.servlet</groupId>
-			<artifactId>javax.servlet-api</artifactId>
-		</dependency>
-		<dependency>
-			<groupId>org.springframework.security</groupId>
-			<artifactId>spring-security-config</artifactId>
-		</dependency>
-		<dependency>
-			<groupId>org.springframework.security</groupId>
-			<artifactId>spring-security-web</artifactId>
+			<groupId>${project.groupId}</groupId>
+			<artifactId>spring-boot-starter-security</artifactId>
 		</dependency>
 	</dependencies>
 	<build>