YAML does not allow string to begin with %, so the default must be set outside of the InputParameters object.
YAML does not allow string to begin with %, so the default must be set outside of the InputParameters object.

(refs #6001)

SudiptaBiswas/moose,bwspenc/moose,liuwenf/moose,lindsayad/moose,YaqiWang/moose,harterj/moose,andrsd/moose,permcody/moose,idaholab/moose,stimpsonsg/moose,joshua-cogliati-inl/moose,jhbradley/moose,bwspenc/moose,dschwen/moose,permcody/moose,bwspenc/moose,wgapl/moose,giopastor/moose,dschwen/moose,katyhuff/moose,backmari/moose,YaqiWang/moose,backmari/moose,jiangwen84/moose,jiangwen84/moose,SudiptaBiswas/moose,friedmud/moose,jessecarterMOOSE/moose,bwspenc/moose,jhbradley/moose,yipenggao/moose,giopastor/moose,joshua-cogliati-inl/moose,wgapl/moose,sapitts/moose,nuclear-wizard/moose,idaholab/moose,liuwenf/moose,laagesen/moose,katyhuff/moose,lindsayad/moose,jessecarterMOOSE/moose,jhbradley/moose,liuwenf/moose,andrsd/moose,stimpsonsg/moose,YaqiWang/moose,andrsd/moose,liuwenf/moose,katyhuff/moose,dschwen/moose,harterj/moose,bwspenc/moose,milljm/moose,yipenggao/moose,sapitts/moose,milljm/moose,sapitts/moose,nuclear-wizard/moose,backmari/moose,jessecarterMOOSE/moose,laagesen/moose,Chuban/moose,laagesen/moose,stimpsonsg/moose,idaholab/moose,wgapl/moose,jiangwen84/moose,backmari/moose,liuwenf/moose,lindsayad/moose,milljm/moose,katyhuff/moose,andrsd/moose,milljm/moose,andrsd/moose,Chuban/moose,lindsayad/moose,permcody/moose,wgapl/moose,dschwen/moose,dschwen/moose,liuwenf/moose,nuclear-wizard/moose,Chuban/moose,laagesen/moose,YaqiWang/moose,stimpsonsg/moose,jiangwen84/moose,SudiptaBiswas/moose,giopastor/moose,jessecarterMOOSE/moose,friedmud/moose,sapitts/moose,giopastor/moose,nuclear-wizard/moose,idaholab/moose,joshua-cogliati-inl/moose,SudiptaBiswas/moose,jhbradley/moose,friedmud/moose,sapitts/moose,friedmud/moose,SudiptaBiswas/moose,idaholab/moose,milljm/moose,jasondhales/moose,jasondhales/moose,joshua-cogliati-inl/moose,laagesen/moose,yipenggao/moose,lindsayad/moose,yipenggao/moose,harterj/moose,jessecarterMOOSE/moose,jasondhales/moose,jasondhales/moose,Chuban/moose,permcody/moose,harterj/moose,harterj/moose