Rationalised the named of uncoupled particle tracing solvers and functionObject

Solvers
    icoUncoupledKinematicParcelFoam -> particleFoam
    uncoupledKinematicParcelFoam -> rhoParticleFoam

functionObjects
    icoUncoupledKinematicCloud -> particles

tutorials/IO/fileHandler/system/controlDict

@@ -15,7 +15,7 @@ FoamFile
 }
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
-application     icoUncoupledKinematicParcelFoam;
+application     particleFoam;
 
 startFrom       latestTime;