Feature: add a bulk loader for rest mapping / SSSOM integration

[syphax-bouazzouni]

Prerequisite

• Feature: extract ontology URI automatically in submissions process #153

What

This PR extends our mappings module with a method called bulk_load_mappings that from a set of mapping hash having the bellow schema, will add them all as Rest mappings.

 mapping_hash = {
      "classes": ["http://bioontology.org/ontologies/BiomedicalResourceOntology.owl#Image_Algorithm"
                    ,"http://purl.org/incf/ontology/Computational_Neurosciences/cno_alpha.owl#cno_0000202"],
     
      "name": 'This is the mappings produced to test the bulk load',
      "source": 'https://w3id.org/semapv/LexicalMatching',
      "comment": 'mock data',
      "relation": [
          'http://www.w3.org/2002/07/owl#subClassOf'
       ],
      "subject_source_id": 'http://bioontology.org/ontologies/BiomedicalResources.owl',
      "object_source_id": 'http://purl.org/incf/ontology/Computational_Neurosciences/cno_alpha.owl',
      "source_name": 'https://w3id.org/sssom/mapping/tests/data/basic.tsv',
      "source_contact_info": 'orcid:1234,orcid:5678',
       "date": '2020-05-30' 
    }

Why

• Implement a script to load SSSOM mappings to AgroPortal agroportal/project-management#265

How to

See the test example : https://github.com/ontoportal-lirmm/ontologies_linked_data/blob/73b15a8b40a219d48798173ff57df812eb9296a5/test/mappings/test_mappings_bulk_load.rb#L29