Feature: Add the option for federated call to have specific params values

[syphax-bouazzouni]

This PR add the possibility in a federated call, the have the option to have specific request parameters for each federated portal, the is useful for endpoints like the /annotator that require to have the parameter ontologies containing only ontologies from that portal, otherwise it returns an error message, even if some of the acronyms do exist in that portal.

Usage

params = {
agroportal: {text: 'text1', ontologies: 'INRAETHES'},
eartportal: {text: 'text1', ontologies:  'ACTRIS'}
}
 LinkedData::Client::Models::Class.federated_get(params) {|api| "#{api}/annotator"}

this will call

https://data.agroportal.lirmm.fr/annotator?text=text1&ontologies=INRAETHES

and

https://data.agroportal.lirmm.fr/annotator?text=text1&ontologies=ACTRIS