Better e2e tests coverage

- Add integration tests for e2e samples.
- Add some missing commands for new annotation system.
- Backport #654
- Fixes #655

spring-shell-samples/src/main/java/org/springframework/shell/samples/e2e/ErrorHandlingCommands.java

@@ -167,7 +167,8 @@ public class ErrorHandlingCommands {
 				return CommandHandlingResult.of("Hi, handled custom exception 3\n", 3);
 			}
 			if (e instanceof CustomException4) {
-				return CommandHandlingResult.of("Hi, handled custom exception\n", 42);
+				String msg = String.format("Hi, handled custom exception %s\n", e);
+				return CommandHandlingResult.of(msg, 42);
 			}
 			if (e instanceof IllegalArgumentException) {
 				return CommandHandlingResult.of("Hi, handled illegal exception\n", 42);