CB registrations

Number of APIs: 4

1. Fiware registrations POST {{baseUrl}}/v2/registrations

2. Fiware registrations GET {{baseUrl}}/v2/registrations

3. Fiware get data from reg - TODO GET {{baseUrl}}/v2/entities?options=keyValues

4. Fiware registrations DELETE {{baseUrl}}/v2/registrations/62f358e0c813e227365d55fd