Mix-ins added for Jackson Serialization/deserialization

Fixes gh-434

samples/httpsession-redis-json/src/main/java/sample/Application.java

@@ -0,0 +1,15 @@
+package sample;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+/**
+ * @author jitendra on 3/3/16.
+ */
+@SpringBootApplication
+public class Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+}