noosfero | Followers permissions fixes (!1024)

[Leandro Nunes]

New comment for Merge Request !1024:

https://gitlab.com/noosfero/noosfero/merge_requests/1024#note_24059352


@fabio1079 this code is not related with merge request description.
I will close this MR. 
Please feel free to send a new one with the description and code compatibility


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