Nice to have a sanity check of what tasks are cancelled
Nice to have a sanity check of what tasks are cancelled

Helps to match cancelled tasks to run-cancel requests in test_http
and in Sirepo.

mkeilman/sirepo,radiasoft/sirepo,radiasoft/sirepo,radiasoft/sirepo,radiasoft/sirepo,mkeilman/sirepo,radiasoft/sirepo,mkeilman/sirepo,mkeilman/sirepo