Updated rdg module
Updated rdg module

refs #7967

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