Access the parent interface method to report a transaction error

Inherits the parent interface and adds a read-only transaction annotation to the interface, prompting a transaction error when accessing the parent interface method

# Environment Information

- **Operating System**: windows
- **Micronaut Version:** 1.3.6
- **JDK Version:** jdk8

### Steps to Reproduce

```
public interface Service {
@Transactional(readOnly = false)
T save1(T o);
}

@Transactional(readOnly = true)
public interface DemoService extends Service{
@Transactional(readOnly = false)
T save2(T o);
}

```

1. save1

Caused by: java.sql.SQLException: Connection is read-only. Queries leading to data modification are not allowed

2. save2

It's ok

No source file or test is named. Start by running the supplied Service and DemoService reproducer on Micronaut 1.3.6 and trace transaction annotation resolution for the inherited save1 method versus save2. Done means save1 can modify data without the read-only connection error while read-only behavior remains correct elsewhere.

Written by the indexing model from the issue text.