Bug: replication broken when config read from file path

[sitano]

The bug is here https://github.com/hashicorp/consul-replicate/blob/master/config.go#L360 and at #L369.

In #L360 it's passing prefix.Source which in case of config should not contain @dc suffix, because this kind of data now sits in separate field.

Thus, dep.NewKVListQuery misses the point of extracting source datacenter from file config.

Then, assigning in #L369 assumes there is no @dc suffix in the source. So, both possible configuration options ends up broken with file config.

[sitano]

This is ongoing fix to #67 #66

[sitano]

Personally, I would change dep.NewKVListQuery arguments to exactly accept dc and prefix, thus, omitting the parsing side effect.