noosfero | Fixes some selenium tests failing on "Follow" step (#779)

[Tallys Martins]

New comment for Merge Request 779

https://gitlab.com/noosfero/noosfero/merge_requests/779#note_3457493


Tallys Martins

I tried the lines below,  but it was taking too much time to raise exception and execute with selenium driver, so I simple wrote an if... 
```ruby 
begin
  obj.click
rescue
  execute_script..
end
```

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