BUG: Incorrect points reported in multiSolidBody motion

src/dynamicMesh/motionSolvers/displacement/solidBody/multiSolidBodyMotionSolver.C

should report total points being used. It reports only from master at the moment.

            Info<< "Applying solid body motion " << SBMFs_[zonei].type()
                << " to "
                << returnReduce(pointIDs_[zonei].size(), sumOp<label>())
                << " points of cellZone " << iter().keyword() << endl;

@Mattijs @andy @Sergio

Cross reference: EP#793