Force adaptor type if API returns wrong type
Force adaptor type if API returns wrong type

In few cases we need a Vega adaptor but the API will return an Ensembl
adaptor because of caching.
If an alternative adaptor is given in parameter, then we force the object
type

Ensembl/ensembl-analysis,Ensembl/ensembl-analysis,Ensembl/ensembl-analysis