ENH: snappyHexMesh: split debug

.../autoMesh/autoHexMesh/autoHexMeshDriver/autoLayerDriver.C

...esh/autoHexMesh/autoHexMeshDriver/autoLayerDriverShrink.C

...autoMesh/autoHexMesh/autoHexMeshDriver/autoRefineDriver.C

...h/autoMesh/autoHexMesh/autoHexMeshDriver/autoSnapDriver.C

...mesh/autoMesh/autoHexMesh/meshRefinement/meshRefinement.H

...toMesh/autoHexMesh/meshRefinement/meshRefinementBaffles.C

...autoMesh/autoHexMesh/meshRefinement/meshRefinementMerge.C

...h/autoHexMesh/meshRefinement/meshRefinementProblemCells.C

...utoMesh/autoHexMesh/meshRefinement/meshRefinementRefine.C