VB-13: Add new endpoint to get a request by ID

[alexciornii]

GET /api/requests/{request_id}
Media type: Application/json

Path parameters:

• request_id

Responses:
200: Request object found
Example value:

{
  "id": "1",
  "beneficiary": "beneficiary_id",
  "user": "user_id",
  "status": "new",
  "secret": "string",
  "urgent": false,
  "comments": "string",
  "has_symptoms": false,
  "cluster": "cluster_id",
  "created_at": "2020-09-10T21:31:16.741Z"
}

400: Bad request
Example value:

{
  "code": "string",
  "message": "string"
}

401: Unauthorized Access
Example value:
Unauthorized Access

[RomanCudreavtev]

Please sign on me.

[johnsmithm]

i added the functionality in the endpoint /api/request/filters/1/5?id=aasdadadsa in #115 , I think it is enough. @alexciornii what do you think?