HPCC-8926 Fix ecl-queries still using queryset instead of target

ecl-queries will now use a single target parameter rather than
queryset and target.  This will reduce confusion and prevent having
to enter the value twice.

Signed-off-by: Anthony Fishbeck <Anthony.Fishbeck@lexisnexis.com>
Merge pull request #4120 from afishbeck/ecl_queries_copy_target

HPCC-8926 Fix ecl-queries still using queryset instead of target

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>