Nope, for Drivers, it never saved that.
We handle drivers and app differently, we still need to unify our handling of these. For Apps, it gets stored in a setting in the database automatically, for Drivers you can include it as part of the definition.
metadata {
definition(name: "ExampleDriver", namespace: "example", author: "Example", importUrl: "http://example.com/ExampleDriver.groovy") {
...
}
