Add new boot based samples

spring-security-kerberos-samples/sec-server-client-auth/src/main/java/demo/app/Application.java

@@ -0,0 +1,16 @@
+package demo.app;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.autoconfigure.security.SecurityAutoConfiguration;
+
+@SpringBootApplication
+@EnableAutoConfiguration(exclude = SecurityAutoConfiguration.class)
+public class Application {
+
+    public static void main(String[] args) throws Throwable {
+        SpringApplication.run(Application.class, args);
+    }
+
+}