Polish and fix up the :spring-session-sample-xml-gemfire-clientserver example module.

samples/xml/gemfire-clientserver/src/main/java/sample/ServerConfig.java

@@ -0,0 +1,33 @@
+/*
+ * Copyright 2014-2016 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package sample;
+
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.ImportResource;
+
+@SuppressWarnings("resource")
+// tag::class[]
+@Configuration // <1>
+@ImportResource("META-INF/spring/session-server.xml") // <2>
+public class ServerConfig {
+
+	public static void main(String[] args) {
+		new AnnotationConfigApplicationContext(ServerConfig.class).registerShutdownHook();
+	}
+}
+// tag::end[]