implement yml scheme integration for Goo models

[syphax-bouazzouni]

Context

Currently, when we want to add metadata to a model attribute (e.g description, helpText, label), we need to put them directly in the code.

Which overloads the code and makes it hard to read it and figure out the logic behind

For example, the attribute natrualLanguage of submissions, is currently so

    attribute :naturalLanguage, namespace: :omv, enforce: [:list], extractedMetadata: true,
                metadataMappings: ["dc:language", "dct:language", "doap:language", "schema:inLanguage"],
                helpText: "The language of the content of the ontology.<br>Consider using a <a target="_blank" href="http://www.lexvo.org/">Lexvo URI</a> with ISO639-3 code.<br>e.g.: http://lexvo.org/id/iso639-3/eng",
                enforcedValues: {
                  "http://lexvo.org/id/iso639-3/eng" => "English",
                  "http://lexvo.org/id/iso639-3/fra" => "French",
                  "http://lexvo.org/id/iso639-3/spa" => "Spanish",
                  "http://lexvo.org/id/iso639-3/por" => "Portuguese",
                  "http://lexvo.org/id/iso639-3/ita" => "Italian",
                  "http://lexvo.org/id/iso639-3/deu" => "German"
                }

Gaol

The goal is to extract the metadata fields in a YAML file, that will present the scheme of a model.

So that in the code we have

     model :ontology_submission,  scheme: 'path to yaml file'

    attribute :naturalLanguage, namespace: :omv, enforce: [:list],  extractedMetadata: true,

and in the YAML file, we will have the following

naturalLanguage:
     metadataMappings: ["dc:language", "dct:language", "dop:language", "schema:inLanguage"]
     helpText: "The language of the content of the ontology.<br>Consider using a <a target="_blank" href="http://www.lexvo.org/">Lexvo URI</a> with ISO639-3 code.<br>e.g.: http://lexvo.org/id/iso639-3/eng"
     enforcedValues: {
        "http://lexvo.org/id/iso639-3/eng": "English",
        "http://lexvo.org/id/iso639-3/fra": "French",
        "http://lexvo.org/id/iso639-3/spa": "Spanish",
        "http://lexvo.org/id/iso639-3/por": "Portuguese",
        "http://lexvo.org/id/iso639-3/ita": "Italian",
        "http://lexvo.org/id/iso639-3/deu": "German",
     }

Requirement

• [x] Read a yaml file
• [x] Append yaml file content to a model settings
• [x] Add tests

[syphax-bouazzouni]

Done with https://github.com/ontoportal-lirmm/goo/pull/30