use getRuntimeExceptionDao() instead of RuntimeExceptionDao.createDao

when using `@OrmLiteDao` on a field that is a class extending from `RuntimeExceptionDao` there is a compile error as RuntimeExceptionDao<T,ID> cannot be assigned to the extending class when using `RuntimExceptionDao.createDao()`

with this change AA generates a statement that uses `databaseHelper_.getRuntimeExceptionDao()` which returns `D extends RuntimeExceptionDao<T, ?>` and therefore can be assigned to the extending class.
@yDelouis that sounds good. i'll update the pr when possible.