generate schema when building vega
generate schema when building vega

@kanitw and @willium and I ran into problems in the past because we forgot to generate a new schema
timelyportfolio/vega,seyfert/vega,seyfert/vega,uwdata/vega,vega/vega,vega/vega,uwdata/vega,nyurik/vega,vega/vega,nyurik/vega,seyfert/vega,lgrammel/vega,vega/vega,timelyportfolio/vega,nyurik/vega