Make slave_dof assertion more flexible for array variables
Make slave_dof assertion more flexible for array variables

idaholab/moose,nuclear-wizard/moose,milljm/moose,harterj/moose,SudiptaBiswas/moose,bwspenc/moose,SudiptaBiswas/moose,bwspenc/moose,jessecarterMOOSE/moose,lindsayad/moose,laagesen/moose,laagesen/moose,jessecarterMOOSE/moose,SudiptaBiswas/moose,milljm/moose,laagesen/moose,milljm/moose,idaholab/moose,nuclear-wizard/moose,bwspenc/moose,SudiptaBiswas/moose,sapitts/moose,andrsd/moose,nuclear-wizard/moose,laagesen/moose,lindsayad/moose,harterj/moose,idaholab/moose,bwspenc/moose,idaholab/moose,andrsd/moose,andrsd/moose,SudiptaBiswas/moose,bwspenc/moose,jessecarterMOOSE/moose,nuclear-wizard/moose,milljm/moose,jessecarterMOOSE/moose,lindsayad/moose,harterj/moose,jessecarterMOOSE/moose,sapitts/moose,sapitts/moose,sapitts/moose,dschwen/moose,harterj/moose,idaholab/moose,dschwen/moose,milljm/moose,sapitts/moose,laagesen/moose,dschwen/moose,andrsd/moose,andrsd/moose,lindsayad/moose,lindsayad/moose,harterj/moose,dschwen/moose,dschwen/moose