noosfero | metadata: marks urls as html safe (#653)

[Bráulio Bhavamitra]

New comment for Merge Request 653

https://gitlab.com/noosfero/noosfero/merge_requests/653#note_1888788


Bráulio Bhavamitra

https://travis-ci.org/coletivoEITA/noosfero-ecosol/builds/75475244

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