Unknown order for properties files with same name

[lightZebra]

If we have 2 or more config.properties files with same name and key and different value we don't know which one would be applied.

[artem-v]

IMO it makes sense to look at https://github.com/scalecube/scalecube-config/blob/develop/config/src/main/java/io/scalecube/config/source/ClassPathConfigSource.java#L103