How does grimoirelab work with sortinghat?

[shanchenqi]

identities.yml file: https://github.com/bitergia/identities

1. grimoirelab2sh will generate a json file according to identities.yml.
2. data in json file will be added to MariDB, containing profiles, organization, identities.
3. If someone has two emails, it will generate two id, but the same uuid for the person in identities.