Upgrade to Spring Security 5.0.0.RC1

Closes gh-10705

spring-boot-project/spring-boot-dependencies/pom.xml

@@ -155,7 +155,7 @@
 		<spring-plugin.version>1.2.0.RELEASE</spring-plugin.version>
 		<spring-restdocs.version>2.0.0.RC1</spring-restdocs.version>
 		<spring-retry.version>1.2.1.RELEASE</spring-retry.version>
-		<spring-security.version>5.0.0.BUILD-SNAPSHOT</spring-security.version>
+		<spring-security.version>5.0.0.RC1</spring-security.version>
 		<spring-session.version>2.0.0.BUILD-SNAPSHOT</spring-session.version>
 		<spring-session-data-mongodb.version>2.0.0.BUILD-SNAPSHOT</spring-session-data-mongodb.version>
 		<spring-social.version>2.0.0.M4</spring-social.version>