Fix logic bug in missing design file check
Fix logic bug in missing design file check

(refs #9638)
SudiptaBiswas/moose,sapitts/moose,andrsd/moose,harterj/moose,dschwen/moose,milljm/moose,lindsayad/moose,YaqiWang/moose,nuclear-wizard/moose,jessecarterMOOSE/moose,harterj/moose,bwspenc/moose,andrsd/moose,laagesen/moose,bwspenc/moose,permcody/moose,andrsd/moose,nuclear-wizard/moose,idaholab/moose,dschwen/moose,milljm/moose,lindsayad/moose,nuclear-wizard/moose,SudiptaBiswas/moose,bwspenc/moose,laagesen/moose,idaholab/moose,nuclear-wizard/moose,harterj/moose,milljm/moose,YaqiWang/moose,sapitts/moose,andrsd/moose,jessecarterMOOSE/moose,jessecarterMOOSE/moose,milljm/moose,bwspenc/moose,jessecarterMOOSE/moose,sapitts/moose,lindsayad/moose,YaqiWang/moose,SudiptaBiswas/moose,permcody/moose,idaholab/moose,permcody/moose,YaqiWang/moose,dschwen/moose,SudiptaBiswas/moose,bwspenc/moose,harterj/moose,laagesen/moose,harterj/moose,dschwen/moose,sapitts/moose,lindsayad/moose,lindsayad/moose,laagesen/moose,SudiptaBiswas/moose,sapitts/moose,andrsd/moose,idaholab/moose,dschwen/moose,permcody/moose,milljm/moose,laagesen/moose,idaholab/moose,jessecarterMOOSE/moose