[bs-19] Medley of changes supporting integration apps

* Use file adapters in sample instead of internal flow
* Add Exception to signature of CommandLineRunner for
implementation convenience
* Updates for Security snapshots

spring-bootstrap/src/main/java/org/springframework/bootstrap/CommandLineRunner.java

@@ -33,6 +33,6 @@ public interface CommandLineRunner {
 	 * Callback used to run the bean.
 	 * @param args incoming main method arguments
 	 */
-	void run(String... args);
+	void run(String... args) throws Exception;
 
 }

spring-bootstrap/src/main/java/org/springframework/bootstrap/SpringApplication.java

@@ -423,7 +423,11 @@ public class SpringApplication {
 				.getBeansOfType(CommandLineRunner.class).values());
 		AnnotationAwareOrderComparator.sort(runners);
 		for (CommandLineRunner runner : runners) {
-			runner.run(args);
+			try {
+				runner.run(args);
+			} catch (Exception e) {
+				throw new IllegalStateException("Failed to execute CommandLineRunner", e);
+			}
 		}
 	}