Clean up shelling out in metadata_to_postgres
Clean up shelling out in metadata_to_postgres

azavea/raster-foundry,aaronxsu/raster-foundry,raster-foundry/raster-foundry,raster-foundry/raster-foundry,azavea/raster-foundry,aaronxsu/raster-foundry,azavea/raster-foundry,azavea/raster-foundry,azavea/raster-foundry,aaronxsu/raster-foundry,raster-foundry/raster-foundry,aaronxsu/raster-foundry