pimpleFoam, rhoPimpleFoam, interDyMFoam: Rationalized mesh-motion support

Added support for mesh-motion update within PIMPLE loop in pimpleFoam and rhoPimpleFoam.

tutorials/multiphase/interDyMFoam/laminar/damBreakWithObstacle/constant/dynamicMeshDict

@@ -47,7 +47,7 @@ correctFluxes
     (phi none)
     (nHatf none)
     (rhoPhi none)
-    (alphaPhi none)
+    (alphaPhi0.water none)
     (ghf none)
 );