HPCC-11375 Query Test Page is initially blank

The first time the query test page is opened, the SOAP tab is blank.

Fixes HPCC-11375

Signed-off-by: Gordon Smith <gordon.smith@lexisnexis.com>
Merge pull request #5939 from GordonSmith/HPCC-11375

HPCC-11375 Query Test Page is initially blank

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>