Add document meta data

[jmontoyaa]

Current behavior / Resultado actual / Résultat actuel

We only save filetype, filesize in the c_document table

Expected behavior / Resultado esperado / Résultat attendu

We need more information of the document example for a video:
the video is a 360 degrees, has VR support, etc ...

[ywarnier]

Add a metadata field in resource_file which will contain a doctrine array.