noosfero | plugins: only call event and default value if needed (!536)

[Marcos Ronaldo Pereira Junior]

Merge Request !536 was closed by Marcos Ronaldo Pereira Junior
Merge Request url: https://gitlab.com/noosfero/noosfero/merge_requests/536
Project:Branches: brauliobo/noosfero:fix-plugins-default-and-hotspots to noosfero/noosfero:master
Author: Bráulio Bhavamitra
Assignee: 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listas.softwarelivre.org/pipermail/noosfero-dev/attachments/20160505/4209e1b1/attachment.html>