fix #2157 need to emulate job_cmd._background_percent_complete lastUpdateTime, frameCount, etc. need defaults
fix #2157 need to emulate job_cmd._background_percent_complete
lastUpdateTime, frameCount, etc. need defaults

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