Add auto compile tweaks for reactor

spring-boot-cli/samples/reactor.groovy

@@ -1,18 +1,34 @@
 package org.test
 
+import java.util.concurrent.CountDownLatch;
+
 @EnableReactor
 @Log
 class Runner implements CommandLineRunner {
 	
 	@Autowired
 	Reactor reactor
+	
+	private CountDownLatch latch = new CountDownLatch(1)
+	
+	@PostConstruct
+	void init() {
+		log.info "Registering consumer"
+		reactor.on(Selectors.$("hello"), [
+			accept: { 
+				log.info("Hello ${it.data}")
+				latch.countDown()
+			}
+		] as Consumer)
+	}
 
 	void run(String... args) {
 		reactor.notify("hello", Event.wrap("Phil"))
 		log.info "Notified Phil"
+		latch.await()
 	}
 	
-	@On(reactor="reactor", selector="hello")
+	// @On(reactor="reactor", selector="hello")
 	void receive(Event<String> event) {
 		log.info "Hello ${event.data}"
 	} 

spring-boot-cli/src/main/java/org/springframework/boot/cli/compiler/autoconfigure/ReactorCompilerAutoConfiguration.java

@@ -53,9 +53,12 @@ public class ReactorCompilerAutoConfiguration extends CompilerAutoConfiguration
 	@Override
 	public void applyImports(ImportCustomizer imports) {
 		imports.addImports("reactor.core.Reactor", "reactor.event.Event",
+				"reactor.function.Consumer", "reactor.function.Functions",
+				"reactor.event.selector.Selectors",
 				"reactor.spring.context.annotation.On",
 				"reactor.spring.context.annotation.Reply",
-				EnableReactor.class.getCanonicalName());
+				EnableReactor.class.getCanonicalName()).addStarImports(
+				"reactor.event.Selectors");
 	}
 
 	@Target(ElementType.TYPE)