Update for alternative VOF flux update: rho solver

tutorials/multiphase/MRFInterFoam/mixerVessel2D/system/fvSolution

@@ -17,6 +17,8 @@ FoamFile
 
 solvers
 {
+    rho
+    {}
     pcorr
     {
         solver          PCG;

tutorials/multiphase/interDyMFoam/ras/damBreakWithObstacle/system/fvSolution

@@ -17,6 +17,8 @@ FoamFile
 
 solvers
 {
+    rho
+    {}
     pcorr
     {
         solver          PCG;

tutorials/multiphase/interDyMFoam/ras/floatingObject/system/fvSolution

@@ -28,7 +28,8 @@ solvers
         agglomerator    faceAreaPair;
         mergeLevels     1;
     }
-
+    rho
+    {}
     pcorr
     {
         solver          PCG;

tutorials/multiphase/interDyMFoam/ras/sloshingTank2D/system/fvSolution

@@ -17,6 +17,8 @@ FoamFile
 
 solvers
 {
+    rho
+    {}
     pcorr
     {
         solver          PCG;

tutorials/multiphase/interDyMFoam/ras/sloshingTank2D3DoF/system/fvSolution

@@ -17,6 +17,8 @@ FoamFile
 
 solvers
 {
+    rho
+    {}
     pcorr
     {
         solver          PCG;

tutorials/multiphase/interDyMFoam/ras/sloshingTank3D/system/fvSolution

@@ -17,6 +17,8 @@ FoamFile
 
 solvers
 {
+    rho
+    {}
     pcorr
     {
         solver          PCG;

tutorials/multiphase/interDyMFoam/ras/sloshingTank3D3DoF/system/fvSolution

@@ -17,6 +17,8 @@ FoamFile
 
 solvers
 {
+    rho
+    {}
     pcorr
     {
         solver          PCG;

tutorials/multiphase/interDyMFoam/ras/sloshingTank3D6DoF/system/fvSolution

@@ -17,6 +17,8 @@ FoamFile
 
 solvers
 {
+    rho
+    {}
     pcorr
     {
         solver          PCG;