Feature: Add new AgroPortal model migration script

[syphax-bouazzouni]

Context

See agroportal/project-management#411

This PR adds a script that do the following migration actions

• Transform all the URI attributes from String to URIs
• Reset to nil the validity date if invalid (inferior to creation date)
• Set curatedOn date to creationDate if invalid
• Add ontologies views to the hasPart attribute if invalid
• Set URI = submission.id if URI is null
• Reject URI from the identifier values if found.
• Transform designedForOntologyTask string to URI by adding the namespace http://omv.ontoware.org/2005/05/ontology#
• Set modificationDate = creationDate, if invalid
• Transform naturalLanguage string to URI by adding the namespace http://lexvo.org/id/iso639-1/
• Transform isOfType string to URI by adding the namespace "http://omv.ontoware.org/2005/05/ontology#
• Set description = "#{ontology_acronym} description", if no description given
• Transfrom all agent attributes from String to Agent object; by reusing the string as the object name.

Changes

• Add Agroportal new model migration script (75f9f69)