remove semicolon from CREATE TABLE legacy template
It's not necessary and causes some DB engines to choke (e.g., Impala)

@jorisvandenbossche ?
@hayd 

is this covered by new sql stuff?
 In principle we don't want to add support for more databases to the legacy code (that was the purpose of the new sqlalchemy based functions), but for such a small change this is OK for me.
 ok...prob untested right? go ahed and merge
