When I add a layer to GeoServer and no layer is added, there is no error given by CLI indicating that no layer was added.

I expect when adding a layer fails that a clear message is given by CLI indicating that no layer was added.

I followed this tutorial and when executed geowave gs layer add gdelt-kde I got the following message:

Add GeoServer layer for 'gdelt-kde: OK : {
  "description": "Please use -a, or choose one of these with -id:",
  "layers":   [
        {
      "id": "gdeltevent_kde",
      "type": "raster"
    },
        {
      "id": "gdeltevent",
      "type": "vector"
    }
  ]
}

This message is generated by org.locationtech.geowave.cli.geoserver.GeoServerRestClient#addLayer. Further inspection of the code reveals that no layer was added in this case because addlayer doesn't know how to deal with multiple adapters.