Start building against Spring Session 1.3.5 snapshots

See gh-15418

spring-boot-dependencies/pom.xml

@@ -170,7 +170,7 @@
 		<spring-security.version>4.2.10.RELEASE</spring-security.version>
 		<spring-security-jwt.version>1.0.9.RELEASE</spring-security-jwt.version>
 		<spring-security-oauth.version>2.0.16.RELEASE</spring-security-oauth.version>
-		<spring-session.version>1.3.4.RELEASE</spring-session.version>
+		<spring-session.version>1.3.5.BUILD-SNAPSHOT</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>
 		<spring-social-linkedin.version>1.0.2.RELEASE</spring-social-linkedin.version>