aligned BBPkeepref(), BBPreleaseref() & BBPreleaselref() with default to plug BAT leaks, i.e., ensure that BATs with refcount 0 are indeed freed
aligned BBPkeepref(), BBPreleaseref() & BBPreleaselref() with default
to plug BAT leaks, i.e., ensure that BATs with refcount 0 are indeed freed

zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb