Fix bad call to readOutput
Fix bad call to readOutput

RunPBS was left behind when we updated utils.py.

Closes #13139

dschwen/moose,andrsd/moose,lindsayad/moose,SudiptaBiswas/moose,dschwen/moose,sapitts/moose,nuclear-wizard/moose,bwspenc/moose,milljm/moose,sapitts/moose,andrsd/moose,bwspenc/moose,SudiptaBiswas/moose,laagesen/moose,bwspenc/moose,bwspenc/moose,andrsd/moose,milljm/moose,permcody/moose,idaholab/moose,jessecarterMOOSE/moose,sapitts/moose,dschwen/moose,laagesen/moose,permcody/moose,nuclear-wizard/moose,sapitts/moose,harterj/moose,harterj/moose,YaqiWang/moose,idaholab/moose,SudiptaBiswas/moose,permcody/moose,laagesen/moose,permcody/moose,bwspenc/moose,milljm/moose,milljm/moose,dschwen/moose,idaholab/moose,nuclear-wizard/moose,laagesen/moose,harterj/moose,lindsayad/moose,andrsd/moose,harterj/moose,lindsayad/moose,SudiptaBiswas/moose,jessecarterMOOSE/moose,dschwen/moose,lindsayad/moose,milljm/moose,laagesen/moose,SudiptaBiswas/moose,jessecarterMOOSE/moose,YaqiWang/moose,andrsd/moose,harterj/moose,YaqiWang/moose,jessecarterMOOSE/moose,idaholab/moose,YaqiWang/moose,nuclear-wizard/moose,jessecarterMOOSE/moose,sapitts/moose,lindsayad/moose,idaholab/moose