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-web-jsp/src/test/java/sample/jsp/SampleWebJspApplicationTests.java

@@ -18,6 +18,7 @@ package sample.jsp;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Value;
 import org.springframework.boot.test.IntegrationTest;
 import org.springframework.boot.test.TestRestTemplate;
 import org.springframework.boot.test.SpringApplicationConfiguration;
@@ -38,14 +39,17 @@ import static org.junit.Assert.assertTrue;
 @RunWith(SpringJUnit4ClassRunner.class)
 @SpringApplicationConfiguration(classes = SampleWebJspApplication.class)
 @WebAppConfiguration
-@IntegrationTest
+@IntegrationTest("server.port:0")
 @DirtiesContext
 public class SampleWebJspApplicationTests {
 
+	@Value("${local.server.port}")
+	private int port;
+
 	@Test
 	public void testJspWithEl() throws Exception {
 		ResponseEntity<String> entity = new TestRestTemplate().getForEntity(
-				"http://localhost:8080", String.class);
+				"http://localhost:" + port, String.class);
 		assertEquals(HttpStatus.OK, entity.getStatusCode());
 		assertTrue("Wrong body:\n" + entity.getBody(),
 				entity.getBody().contains("/resources/text.txt"));