Allow param in JSON as a list of parameters

[antonylebechec]

In order to perform multiple processes, a param.json file as a list of dict (i.e. list of param in JSON) could be used.

Example:

[
   {
      "annotation": {...}
   },
   {
      "calculation": {...}
   },
   {
      "annotation": {...},
      "calculation": {...},
      "prioritization": {...}
   }
]