* Allow a driver to customize the query remarks

This allows driver-specific metadata to be added to each query. If the
driver can apply the default metadata, it should call
default-query->remark

Removed timezone test that isn't testing the driver itself, since the
driver doesn't specify a default timezone

Removed deprecated code from the redshift test

Leave the original parameters from the front-end as :user-parameters so
that they are accessible down in the drivers

Transform the original parameters into the field_values in the query
remark