Eliminated U# notation for solution variables
Eliminated U# notation for solution variables

Refs idaholab/relap-7#19688
milljm/moose,idaholab/moose,laagesen/moose,sapitts/moose,milljm/moose,harterj/moose,milljm/moose,bwspenc/moose,dschwen/moose,andrsd/moose,laagesen/moose,lindsayad/moose,laagesen/moose,bwspenc/moose,harterj/moose,bwspenc/moose,bwspenc/moose,lindsayad/moose,dschwen/moose,idaholab/moose,jessecarterMOOSE/moose,dschwen/moose,jessecarterMOOSE/moose,andrsd/moose,milljm/moose,sapitts/moose,milljm/moose,lindsayad/moose,dschwen/moose,idaholab/moose,andrsd/moose,andrsd/moose,sapitts/moose,lindsayad/moose,harterj/moose,laagesen/moose,sapitts/moose,idaholab/moose,idaholab/moose,andrsd/moose,jessecarterMOOSE/moose,lindsayad/moose,dschwen/moose,harterj/moose,sapitts/moose,laagesen/moose,jessecarterMOOSE/moose,jessecarterMOOSE/moose,harterj/moose,bwspenc/moose