Missing required files and API results

[AntoineAugusti]

Follow up of #127 and the fix introduced in #169

What is the issue and why is it an issue?

When a file is missing but required, the API now says

"summary": {
  "errorsCount": 0,
  "hasErrors": true
}

which seems unexpected.

Example

Proposed fix

errorsCount should be the sum of GBFS errors + the number of missing required files

[jcpitre]

Some work has been done on a similar issue: #169

[AntoineAugusti]

Thank you for the fix @Alessandro100! It works: example