Fix bilinear interpolation unit test
Fix bilinear interpolation unit test

andrsd/moose,sapitts/moose,idaholab/moose,andrsd/moose,sapitts/moose,idaholab/moose,sapitts/moose,idaholab/moose,andrsd/moose,idaholab/moose,idaholab/moose,laagesen/moose,laagesen/moose,andrsd/moose,laagesen/moose,laagesen/moose,laagesen/moose,sapitts/moose,sapitts/moose,andrsd/moose