ENH: mapped: use coupleGroup specification

tutorials/heatTransfer/buoyantSimpleFoam/circuitBoardCooling/0.org/include/1DBaffle/1DTemperatureMasterBafflePatches

@@ -9,7 +9,6 @@
 T
 {
     type   compressible::thermalBaffle1D<hConstSolidThermoPhysics>;
-    samplePatch     baffle1DWall_slave;
 
     thickness       uniform 0.005;  // thickness [m]
     Qs              uniform 100;    // heat flux [W/m2]

tutorials/heatTransfer/buoyantSimpleFoam/circuitBoardCooling/system/createBafflesDict

@@ -29,35 +29,13 @@ baffles
         surface     triSurfaceMesh;
         name        baffle1D.stl;
 
-        patches
+        patchPairs
         {
-            master
-            {
-                //- Master side patch
-                name            baffle1DWall_master;
-
-                type            wall;
-                inGroups        (baffleWallGroup);
-
-                patchFields
-                {
-                    #include "./0/include/wallBafflePatches"
-                    #include "./0/include/1DBaffle/1DTemperatureMasterBafflePatches"
-                }
-            }
-            slave
+            type            wall;
+            patchFields
             {
-                //- Slave side patch
-                name            baffle1DWall_slave;
-
-                type            wall;
-                inGroups        (baffleWallGroup);
-
-                patchFields
-                {
-                    #include "./0/include/wallBafflePatches"
-                    #include "./0/include/1DBaffle/1DTemperatureSlaveBafflePatches"
-                }
+                #include "./0/include/wallBafflePatches"
+                #include "./0/include/1DBaffle/1DTemperatureMasterBafflePatches"
             }
         }
     }
@@ -78,10 +56,7 @@ baffles
                 name            ${masterPatchName};
 
                 type            mappedWall;
-
-
-                type            interRegionMappedWallGenerator;
-                                inGroups        (baffleWallGroup);
+                inGroups        (baffleWallGroup);
 
                 sampleMode      nearestPatchFace;
                 sampleRegion    ${baffleRegionName};