Remove deprecated concat::setup and change Modulefile to metadata.json

`concat::setup` has been deprecated and is no longer needed. Modulefile is also deprecated and metadata.json should be used instead.

`order` parameter for `concat::fragment` must be a string.
not really, just `puppet module build` by default creates in such format `>= 1.0.0` so I put here same, but yeah can change it to `1.x`