feature flag upgrade code to spring 3.1.3 #286

<dependency>
	 <groupId>org.springframework.boot</groupId>
	 <artifactId>spring-boot-starter-validation</artifactId>
	</dependency>
	<dependency>
	 <groupId>javax.annotation</groupId>
	 <artifactId>javax.annotation-api</artifactId>
	 <version>1.3.2</version>
	</dependency>

these two extra depencides should be added