Use xml / javaconfig folders for samples

Fixes gh-3752

samples/xml/preauth/src/test/java/sample/PreAuthXmlTests.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2002-2016 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.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.security.web.FilterChainProxy;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.web.WebAppConfiguration;
+
+/**
+ * @author Rob Winch
+ */
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration("file:src/main/webapp/WEB-INF/applicationContext-security.xml")
+@WebAppConfiguration
+public class PreAuthXmlTests {
+	@Autowired
+	FilterChainProxy filterChainProxy;
+
+	@Test
+	public void configLoads() {}
+}