Try killing nicely before doing a hard kill.
Try killing nicely before doing a hard kill.

closes #8923

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