DiscoverSchema parameters are not correctly mapped in Studio GuessSchema runtime

need to fix mapping in buildActionConfig()
https://github.com/Talend/component-runtime/blob/master/component-studio/component-runtime-di/src/main/java/org/talend/sdk/component/runtime/di/schema/TaCoKitGuessSchema.java#L188-L190

The problem appears, when dataset is not root Configuration.
Consider following configuration option:
config.dataset.someProp

Dataset prefix will be "dataset"
But during resolving properties from configuration

return configuration.entrySet().stream().collect(toMap(
                e -> prefix + "." + e.getKey().substring(dotIndex + 1, e.getKey().length()), Map.Entry::getValue));

it will create a path like: dataset.dataset.someProp