Specify table dimensions even if just using defaults

The new parser requires the TABDIMS keyword to be present, even if
no other than the default values are specified.
Use defaults instead of invalid values for rates

The contents of the fourth to eight item should really not matter; the
control mode of the well is explicitly set in item 3. However, the new
parser requires values to be defaulted if they are not to be specified;
if there is a value in the item -- even if it has an invalid value such
as -1 -- it is interpreted as that control mode should be used.