Update pom to include spy memcached 2.4.2

Author: raykrueger

pom.xml

@@ -159,7 +159,7 @@
         <dependency>
             <groupId>spy</groupId>
             <artifactId>memcached</artifactId>
-            <version>2.3.1</version>
+            <version>2.4.2</version>
         </dependency>
         <dependency>
             <groupId>com.danga</groupId>