Task/392 service path rest of query context

### Description
Simplified the EntityId part of the query.
Also, "added" the ServicePath path for the query.
This change in the query structure has an implication that we have to take into account... Given that the query is not done with "_id" but with "_id.id", "_id.type" and "_id.servicePath", we should analyze if the "_id" is no longer useful for query resolution and we have to define other indexes (at least for "_id.id").

NTC (in the code scope, but we should talk with @iariasleon about this for testing)