Use a random server port in the Couchbase sample’s tests

spring-boot-samples/spring-boot-sample-data-couchbase/src/test/java/sample/data/couchbase/SampleCouchbaseApplicationTests.java

@@ -20,7 +20,7 @@ public class SampleCouchbaseApplicationTests {
 	public void testDefaultSettings() throws Exception {
 		try {
 			new SpringApplicationBuilder(SampleCouchbaseApplication.class)
-					.run();
+					.run("--server.port=0");
 		}
 		catch (RuntimeException ex) {
 			if (serverNotRunning(ex)) {