HPCC-11623 Query details should report files used in alphabetical order

Signed-off-by: Anthony Fishbeck <anthony.fishbeck@lexisnexis.com>
Merge pull request #6038 from afishbeck/sortedQueryFileList

HPCC-11623 Query details should report files used in alphabetical order

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>