Add company structure to lease request
Currently in registry.lease_request there's only contact point. But according to regulations for companies there should be an option to fill in company information. Initially we planned companies to put the information to description. But later we've restricted access to contact point data, and description is left public, which is not correct So, we need:
- add requestorCompany model (Company)
- make it restricted in the same way as it works work contact point