Fix memory leak in PenetrationLocator::reinit()
Fix memory leak in PenetrationLocator::reinit()

And since a PenetrationInfo object is itself an owner of an Elem
object via _side, this probably explains the memory leak that's
blocking resolution of #6799

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