Remove manual memory management from SimpleFluidPropertiesTest.
Remove manual memory management from SimpleFluidPropertiesTest.

Noticed while reviewing #8897.

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