Upgrade to Spring Security Oauth 2.0.18.RELEASE

Closes gh-17671

Author: snicoll

spring-boot-dependencies/pom.xml

@@ -169,7 +169,7 @@
 		<spring-retry.version>1.2.4.RELEASE</spring-retry.version>
 		<spring-security.version>4.2.13.RELEASE</spring-security.version>
 		<spring-security-jwt.version>1.0.10.RELEASE</spring-security-jwt.version>
-		<spring-security-oauth.version>2.0.17.RELEASE</spring-security-oauth.version>
+		<spring-security-oauth.version>2.0.18.RELEASE</spring-security-oauth.version>
 		<spring-session.version>1.3.5.RELEASE</spring-session.version>
 		<spring-social.version>1.1.6.RELEASE</spring-social.version>
 		<spring-social-facebook.version>2.0.3.RELEASE</spring-social-facebook.version>