Start building against Spring Security 5.0.2 snapshots

See gh-11870

Author: wilkinsona

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

@@ -152,7 +152,7 @@
 		<spring-plugin.version>1.2.0.RELEASE</spring-plugin.version>
 		<spring-restdocs.version>2.0.0.RELEASE</spring-restdocs.version>
 		<spring-retry.version>1.2.2.RELEASE</spring-retry.version>
-		<spring-security.version>5.0.1.RELEASE</spring-security.version>
+		<spring-security.version>5.0.2.BUILD-SNAPSHOT</spring-security.version>
 		<spring-session.version>2.0.1.RELEASE</spring-session.version>
 		<spring-session-data-mongodb.version>2.0.0.RELEASE</spring-session-data-mongodb.version>
 		<spring-ws.version>3.0.0.RELEASE</spring-ws.version>