Convert remaining samples to use random port

Partial fix for gh-337. See also gh-607 which complements this, but might
conflict on a merge.

spring-boot-samples/spring-boot-sample-servlet/src/test/java/sample/servlet/SampleServletApplicationTests.java

@@ -16,21 +16,22 @@
 
 package sample.servlet;
 
+import static org.junit.Assert.assertEquals;
+
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
 import org.springframework.boot.autoconfigure.security.SecurityProperties;
 import org.springframework.boot.test.IntegrationTest;
-import org.springframework.boot.test.TestRestTemplate;
 import org.springframework.boot.test.SpringApplicationConfiguration;
+import org.springframework.boot.test.TestRestTemplate;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.test.annotation.DirtiesContext;
 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 import org.springframework.test.context.web.WebAppConfiguration;
 
-import static org.junit.Assert.assertEquals;
-
 /**
  * Basic integration tests for demo application.
  * 
@@ -39,24 +40,27 @@ import static org.junit.Assert.assertEquals;
 @RunWith(SpringJUnit4ClassRunner.class)
 @SpringApplicationConfiguration(classes = SampleServletApplication.class)
 @WebAppConfiguration
-@IntegrationTest
+@IntegrationTest("server.port:0")
 @DirtiesContext
 public class SampleServletApplicationTests {
 
+	@Value("${local.server.port}")
+	private int port;
+
 	@Autowired
 	private SecurityProperties security;
 
 	@Test
 	public void testHomeIsSecure() throws Exception {
 		ResponseEntity<String> entity = new TestRestTemplate().getForEntity(
-				"http://localhost:8080", String.class);
+				"http://localhost:" + port, String.class);
 		assertEquals(HttpStatus.UNAUTHORIZED, entity.getStatusCode());
 	}
 
 	@Test
 	public void testHome() throws Exception {
 		ResponseEntity<String> entity = new TestRestTemplate("user", getPassword())
-				.getForEntity("http://localhost:8080", String.class);
+				.getForEntity("http://localhost:" + port, String.class);
 		assertEquals(HttpStatus.OK, entity.getStatusCode());
 		assertEquals("Hello World", entity.getBody());
 	}