merge patch faces only on meshed patches

...utoMesh/autoHexMesh/autoHexMeshDriver/autoHexMeshDriver.C

...h/autoHexMesh/autoHexMeshDriver/autoHexMeshDriverLayers.C

src/autoMesh/autoHexMesh/meshRefinement/meshRefinement.H

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

src/dynamicMesh/polyTopoChange/polyTopoChange/combineFaces.C

src/dynamicMesh/polyTopoChange/polyTopoChange/combineFaces.H