Add validation rules for ROR and re3data through identifiers.org API

[M-casado]

Based on the requested feature for Biovalidator to interact with identifiers.org API (see elixir-europe/biovalidator#59), the Research Organization Registry (ROR) and re3data could also be included where institutions or affiliations are used.

Both ROR (see record) and re3data (see record) are already registered at identifiers.org, which would make it easy to add with minimal changes to the schemas and no change at all to Biovalidator.

Some examples of where these institution validations could be of use are:

ega-metadata-schema/schemas/EGA.common-definitions.json

Lines 2353 to 2359 in 169470d

	"institutionName": {
	"type": "string",
	"title": "Institution name",
	"description": "The full name of an institution the contact belongs to. In case there are several, separate them with semicolons (;).",
	"minLength": 1,
	"examples": [ "European Genome-phenome Archive (EGA)" ]
	},

ega-metadata-schema/schemas/EGA.protocol.json

Lines 145 to 159 in 169470d

	"protocolPerformers": {
	"type": "array",
	"title": "Protocol performers array",
	"description": "Array of performers' descriptions of those individuals, groups, or institutions that executed the protocol.",
	"additionalProperties": false,
	"uniqueItems": true,
	"minItems": 1,
	"items": {
	"type": "string",
	"title": "Performer of the protocol",
	"description": "Free form text to specify the institution, group, or individuals that performed the protocol.",
	"minLength": 1,
	"examples": ["EGA's Operational bioinformatics group", "Lab technician"]
	}
	},