Add httpsession-xml

Fixes #103

samples/httpsession-xml/build.gradle

@@ -0,0 +1,20 @@
+apply from: JAVA_GRADLE
+apply from: TOMCAT_GRADLE
+
+tasks.findByPath("artifactoryPublish")?.enabled = false
+sonarRunner {
+    skipProject = true
+}
+
+dependencies {
+    compile project(':spring-session-data-redis'),
+            "org.springframework:spring-web:$springVersion",
+            "redis.embedded:embedded-redis:0.2",
+            jstlDependencies
+
+    providedCompile "javax.servlet:javax.servlet-api:$servletApiVersion"
+
+    testCompile 'junit:junit:4.11'
+
+    integrationTestCompile gebDependencies
+}