[hibernate-dev] Legacy positional params and JPA "positional" params

I wont bore everyone with the history here, but long story short is that we need to start treating JPA "positional" parameters as positional in the `javax.persistence.Parameter#getPosition` sense. Even though there is nothing positional about JPA's positional parameters, this has moved from a philosophical discussion to a practical one as the JPA 2.2 TCK is testing this, whereas older ones did not To do that however, we need to drop our older positional parameter support. That feature has been deprecated for quite some time now. Unless there are objections, I will plan on dropping that in 5.3