API: access to non-existent project branch returns 200

Created by: justahero

Using the API to access a project branch that does not exist returns the status code 200 without any json data. The following GET request shows the behavior for a given project with id and the non-existent branch unknown.

GET /api/v3/projects/1/repository/branches/unknown

An error code of 404 should be returned and maybe a message that the branch does not exist.