Improved error check for image info fetching

Some rework for pinterest website scrapper to address https://app.getsentry.com/polishcrew/production/group/41784903/ 
and some other issues i've found while investigating one above.
@mpikula, maybe we can move that line and below to some variables? I mean, we are using it twice, and xpath is in general expensive method. So I would suggest to change it to:

```
def image_data_present?(page, likes, repins)
  !page.css("div[class~=errorMessage]").empty? || likes.blank? || repins.blank?
end
```

What do you think?