Return 404 and no data when querying incorrect requestID

Description

Precondition:
Scope = default and Profile= admin@example.com is in the system

Steps to reproduce
1. Send export profiledata with the scope and email below.

GET:  api/v1.0/ProfilesData/default/admin@example.com/export
It returns the response: 
{
    "Email": "admin@example.com",
    "RequestId": "cX1BWENXQk8BRHRySVBCOkpOAkUkfUQKElFLQwcRInARX0tUFEdWRiV0E1AXARQXbCIyKhYAHwA3AFYcNDY1EQMKAAJsFiUjERwfES0XVx8pKzAMCwQfBl8XbiYfBA",
    "ResultUrl": "https://profilesapi-inte01.profilestore.episerver.net/api/v1.0/ProfilesData/ExportResult/cX1BWENXQk8BRHRySVBCOkpOAkUkfUQKElFLQwcRInARX0tUFEdWRiV0E1AXARQXbCIyKhYAHwA3AFYcNDY1EQMKAAJsFiUjERwfES0XVx8pKzAMCwQfBl8XbiYfBA",
    "Scope": "default",
    "RequestedTime": "2018-11-02T09:26:47.9917692Z",
    "Status": "Accepted"
}

2. Check export profile data status by performing with apart of requestID

 
GET /api/v1.0/ProfilesData/ExportResult/cX1BWENXQk8BRHRySVBCOkpOAk
Actual result: It returns response as below:
{
    "Email": null,
    "RequestId": "cX1BWENXQk8BRHRySVBCOkpOAk",
    "Scope": null,
    "RequestedTime": "0001-01-01T00:00:00",
    "Status": "Invalid"
}

Expected:
404 result. We don't need to return any data in the body.