Modify Integration processResult to handle 3 URLs & 3 results

[Sloox]

processResult needs to be modified once the 3 urls have been passed to the correct locations. We also need to handle the 3 results correctly at this point.

[pawelpasterz]

As discussed:

1. process_result should expect 3 URL strings
2. ...but none is required (URL can be empty)
3. print URLs for failure message only
4. all URLs in one comment
5. print non-empty URL only

cc @Sloox

[pawelpasterz]

Reopen - Mistakenly closed in #1624