Update to Spring Security 3.2.8

https://spring.io/blog/2015/07/23/spring-security-3-2-8-released

Author: praseodym

pom.xml

@@ -71,7 +71,7 @@
 <properties>
 <java-version>1.7</java-version>
 <org.springframework-version>4.1.7.RELEASE</org.springframework-version>
-<spring.security.version>3.2.7.RELEASE</spring.security.version>
+<spring.security.version>3.2.8.RELEASE</spring.security.version>
 <org.slf4j-version>1.7.7</org.slf4j-version>
 </properties>
 <description>A reference implementation of OpenID Connect (http://openid.net/connect/), OAuth 2.0, and UMA built on top of Java, Spring, and Spring Security. The project contains a fully functioning server, client, and utility library.</description>