STYLE: overset: change massCorrection to fluxCorrection

COMP: overset: fixes for SPDP, int64

tutorials/basic/overLaplacianDyMFoam/heatTransferFluxConservation1D/0.orig/T

@@ -30,7 +30,7 @@ boundaryField
     free
     {
         type            overset;
-        massCorrection  true;
+        fluxCorrection  true;
         value           uniform 300;
     }
 

tutorials/basic/overLaplacianDyMFoam/heatTransferFluxConservation1D/README.md

@@ -1,17 +1,17 @@
-## Implicit mass conservation test
+## Implicit flux conservation test
 
-The implicit mass conservation is switched on in the field (here T) overset BC.
+The implicit flux conservation is switched on in the field (here T) overset BC.
 
 The keyword is used as:
 
     free
     {
         type            overset;
-        massCorrection  true;
+        fluxCorrection  true;
         value           uniform 300;
     }
 
 A special net fringe flux is output in this tutorial.
 
-Switch `massCorrection` to `false` to evaluate the mass correction.
+Switch `fluxCorrection` to `false` to evaluate the flux correction.
 

tutorials/basic/overLaplacianDyMFoam/heatTransferFluxConservation1D/system/fvSolution

@@ -24,7 +24,7 @@ solvers
         solver          PBiCGStab;
         preconditioner  DILU;
 
-        //// Note: GAMG not supported with massCorrection switched on
+        //// Note: GAMG not supported with fluxCorrection switched on
         //solver          GAMG;
         //smoother        GaussSeidel;
         //nCellsInCoarsestLevel   1;