Provide more succinct syntax option

Since config file lines can be a premium resource in large configs, we can fold the `module` and `class` line into one line by placing the entire path to the class in the driver separated by `.`'s.

If the `module` field is missing, we can try extracting if from the class
from:
```yaml
module: builtins
class: dict
```
to
```yaml
class: builtins.dict
```