Bug: unable to use a config node for source and sink

[jipperinbham]

The following does not work anymore due to the changes to how the config gets merged between the yaml and JS:

transporter eval --config ./test/config.yaml 'Source({name:"localmongo", namespace: "boom.foo"}).save({name:"localmongo", namespace: "boom.baz"})'

It results in:

Mongo Config {URI:mongodb://localhost/boom Namespace:boom.baz Debug:true Tail:false}
Mongo Config {URI:mongodb://localhost/boom Namespace:boom.baz Debug:true Tail:false}
setting start timestamp: 6100960276138426368

where the namespace is the same for both source and sink.