Link EC Projects (Awards vocabulary) to EuroSciVoc subjects and participating organizations with data from CORDIS

[ptamarit]

• Partially fixes Link EC Projects (Awards vocabulary) to EuroSciVoc subjects and participating organizations with data from CORDIS #382
• Contains overlapping code with the pull request Affiliations OpenAIRE OpenOrgs PIC #392

To load only one project (adapt the config):

invenio vocabularies update -v awards:cordis -o cordis-HORIZONprojects-xml/xml/project-rcn-257316_en.xml

To load all the projects (adapt the config):

invenio vocabularies update -v awards:cordis -o ../cordis-HORIZONprojects-xml.zip 

To load all the projects from the URL (adapt the config):

invenio vocabularies update -v awards:cordis -o dummy

[slint]

minor: we can copy the structure we have for records on subjects, i.e.:

{
    "subjects": [
        {"id": "euroscivoc:1234"},
        {"subject": "free form subject"},
    ]
}