HPCC-11376 Fix URL used by Query Test Pages to access result schema

Signed-off-by: Anthony Fishbeck <anthony.fishbeck@lexisnexis.com>
Merge pull request #5918 from afishbeck/resultSchemaTab

HPCC-11376 Fix URL used by Query Test Pages to access result schema

Reviewed-By: Gordon Smith <gordon.smith@lexisnexis.com>
Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>