added spring-security-rsa because s-c-context currently requires it.

spring-cloud-starter/pom.xml

@@ -28,6 +28,10 @@
 			<groupId>org.springframework.cloud</groupId>
 			<artifactId>spring-cloud-context</artifactId>
 		</dependency>
+		<dependency>
+			<groupId>org.springframework.security</groupId>
+			<artifactId>spring-security-rsa</artifactId>
+		</dependency>
 		<dependency>
 			<groupId>org.springframework.cloud</groupId>
 			<artifactId>spring-cloud-commons</artifactId>