Reimplemented generic_count() to follow the our specific BaseAdaptor logic
Reimplemented generic_count() to follow the our specific BaseAdaptor logic

The version inherited from Core's BaseAdaptor doesn't really work for us because the interface to define the constraints, the joins, etc is different

Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara