Make some dependencies optional

spring-boot-actuator/pom.xml

@@ -29,10 +29,6 @@
 			<groupId>com.fasterxml.jackson.core</groupId>
 			<artifactId>jackson-databind</artifactId>
 		</dependency>
-		<dependency>
-			<groupId>org.hibernate</groupId>
-			<artifactId>hibernate-validator</artifactId>
-		</dependency>
 		<dependency>
 			<groupId>org.springframework</groupId>
 			<artifactId>spring-core</artifactId>
@@ -41,10 +37,6 @@
 			<groupId>org.springframework</groupId>
 			<artifactId>spring-context</artifactId>
 		</dependency>
-		<dependency>
-			<groupId>org.springframework</groupId>
-			<artifactId>spring-messaging</artifactId>
-		</dependency>
 		<!-- Optional -->
 		<dependency>
 			<groupId>com.codahale.metrics</groupId>
@@ -61,6 +53,16 @@
 			<artifactId>javax.servlet-api</artifactId>
 			<optional>true</optional>
 		</dependency>
+		<dependency>
+			<groupId>org.hibernate</groupId>
+			<artifactId>hibernate-validator</artifactId>
+			<optional>true</optional>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework</groupId>
+			<artifactId>spring-messaging</artifactId>
+			<optional>true</optional>
+		</dependency>
 		<dependency>
 			<groupId>org.springframework</groupId>
 			<artifactId>spring-jdbc</artifactId>