lagrangian: Support meshToMesh mapping

Lagrangian is now compatible with the meshToMesh topology changer. If a
cloud is being simulated and this topology changer is active, then the
cloud data will be automatically mapped between the specified sequence
of meshes in the same way as the finite volume data. This works both for
serial and parallel simulations.

In addition, mapFieldsPar now also supports mapping of Lagrangian data
when run in parallel.

tutorials/lagrangian/particleFoam/hopper/Allclean

@@ -4,11 +4,14 @@ cd ${0%/*} || exit 1    # Run from this directory
 # Source tutorial run functions
 . $WM_PROJECT_DIR/bin/tools/CleanFunctions
 
-cd hopperInitialState
-cleanCase
+(
+    cd hopperInitialState || exit 1
+    cleanCase
+)
 
-cd ../hopperEmptying
-cleanCase
-rm -rf 0
+(
+    cd hopperEmptying || exit 1
+    cleanCase
+)
 
 #------------------------------------------------------------------------------

tutorials/lagrangian/particleFoam/hopper/Allrun

@@ -4,20 +4,21 @@ cd ${0%/*} || exit 1    # Run from this directory
 # Source tutorial run functions
 . $WM_PROJECT_DIR/bin/tools/RunFunctions
 
-cd hopperInitialState
-runApplication blockMesh
-runApplication decomposePar
-runParallel $(getApplication)
-runApplication reconstructPar -latestTime
-cd ..
+(
+    cd hopperInitialState || exit 1
+    runApplication blockMesh
+    runApplication decomposePar
+    runParallel $(getApplication)
+    runApplication reconstructPar
+)
 
-cd hopperEmptying
-rm -rf 0
-cp -R 0.orig 0
-runApplication blockMesh
-runApplication mapFields ../hopperInitialState -sourceTime latestTime
-runApplication decomposePar
-runParallel $(getApplication)
-runApplication reconstructPar
+(
+    cd hopperEmptying || exit 1
+    runApplication blockMesh
+    runApplication decomposePar
+    runParallel mapFieldsPar ../hopperInitialState -sourceTime latestTime
+    runParallel $(getApplication)
+    runApplication reconstructPar
+)
 
 #------------------------------------------------------------------------------