STYLE: improve robustness of wall interactions code (issue #737)

...PatchInteractionModel/LocalInteraction/LocalInteraction.C

...PatchInteractionModel/LocalInteraction/LocalInteraction.H

...PatchInteractionModel/MultiInteraction/MultiInteraction.C

...PatchInteractionModel/MultiInteraction/MultiInteraction.H

...matic/PatchInteractionModel/NoInteraction/NoInteraction.C

...matic/PatchInteractionModel/NoInteraction/NoInteraction.H

...actionModel/PatchInteractionModel/PatchInteractionModel.C

...actionModel/PatchInteractionModel/PatchInteractionModel.H

...bmodels/Kinematic/PatchInteractionModel/Rebound/Rebound.C

...bmodels/Kinematic/PatchInteractionModel/Rebound/Rebound.H

...onModel/StandardWallInteraction/StandardWallInteraction.C

...onModel/StandardWallInteraction/StandardWallInteraction.H

.../simpleReactingParcelFoam/verticalChannel/Allrun-parallel

...eactingParcelFoam/verticalChannel/system/decomposeParDict