Simplify functions in INSBase (#9687)
Simplify functions in INSBase (#9687)

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