[bs-19] Add samples and CLI support for Spring Integration

$ cd spring-bootstrap-cli
    $ export SPRING_HOME=target
    $ src/main/scripts/spring run samples/integration.groovy

The big disadvantage at the moment is that there is no goo way to
detect Spring Integration in the AST (at least not as good as @Enable*).
So for now we are looking for @MessageEndpoint or a class name with
SpringIntegration in it.

[#48151147]

spring-bootstrap-cli/src/test/java/org/springframework/bootstrap/cli/SampleIntegrationTests.java

@@ -55,7 +55,7 @@ public class SampleIntegrationTests {
 	@BeforeClass
 	public static void clean() {
 		// SpringBootstrapCli.main("clean");
-		// System.setProperty("ivy.message.logger.level", "4");
+		// System.setProperty("ivy.message.logger.level", "3");
 	}
 
 	@Test
@@ -63,6 +63,11 @@ public class SampleIntegrationTests {
 		start("samples/app.groovy");
 	}
 
+	@Test
+	public void jobSample() throws Exception {
+		start("samples/job.groovy");
+	}
+
 	@Test
 	public void webSample() throws Exception {
 		start("samples/web.groovy");
@@ -73,4 +78,9 @@ public class SampleIntegrationTests {
 		start("samples/service.groovy");
 	}
 
+	@Test
+	public void integrationSample() throws Exception {
+		start("samples/integration.groovy");
+	}
+
 }