Add EPV tests for Core and all Add-ons

[satanasov]

If I want to validate the extension it should have EPV tests and should pass all of them

• [x] Tests added
• [ ] Fix core errors
  • [ ] Fix event related errors
  • [ ] Fix deprecated function warning
• [ ] Fix EXIF errors
• [ ] Fix ACP Cleanup errors
• [ ] Fix ACP Import errors