contextualizations/contextualizers : switch to a multi-resources model

[robindemourat]

Right now the contextualizers api allows to consume only one resource to produce a contextualization. It should be changed to allow more complex contextualizers and thus be future-proof.

Change in contextualizations generic model :

Actual :

{
  // ...
  "resource": {
    "type": "string"
  }
}

Future (alternative 1) :

{
  // ...
  "resources": { // list of resources of id
    "type": "array",
    "items": {
      "type": "string"
    }
  }
}

Future (alternative 2)

{
  // ...
  "resources": { // hashmap of keys/values, in which keys correspond to roles in the contextualizer, and values to resources' uuid
    "type": "object"
  }
}

Repercussions :

• contextualizers APIs
• templates contextualization wrappers components
• editors design