Add NullRequestCache to rest sample

Fixes gh-183

samples/rest/src/main/java/sample/SecurityConfig.java

@@ -15,32 +15,36 @@
  */
 package sample;
 
-/**
- * @author Rob Winch
- */
-
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
 import org.springframework.security.config.annotation.web.builders.HttpSecurity;
 import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
 import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
+import org.springframework.security.web.savedrequest.NullRequestCache;
 
 @EnableWebSecurity
 public class SecurityConfig extends WebSecurityConfigurerAdapter {
 
+	// @formatter:off
 	@Override
 	protected void configure(HttpSecurity http) throws Exception {
 		http
 			.authorizeRequests()
 				.anyRequest().authenticated()
 				.and()
+			.requestCache()
+				.requestCache(new NullRequestCache())
+				.and()
 			.httpBasic();
 	}
+	// @formatter:on
 
+	// @formatter:off
 	@Autowired
 	public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
 		auth
 			.inMemoryAuthentication()
 				.withUser("user").password("password").roles("USER");
 	}
+	// @formatter:on
 }