message: Bug fix: memory leak in HypreParMatrix * Add(), ParAdd()
  Removes unnecessary hypre_MatvecCommPkgCreate() from Add() and ParAdd().
  hypre_ParcsrAdd() creates the commpkg in hypre v2.14.0 and later, so we
  don't need to create it ourselves.
diff: @@ -1735,7 +1735,6 @@ HypreParMatrix *Add(double alpha, const HypreParMatrix &A,
  {
  hypre_ParCSRMatrix *C;
  hypre_ParcsrAdd(alpha, A, beta, B, &C);
  - hypre_MatvecCommPkgCreate(C);
  return new HypreParMatrix(C);
  }
  @@ -1745,8 +1744,6 @@ HypreParMatrix * ParAdd(const HypreParMatrix *A, const HypreParMatrix *B)
  hypre_ParCSRMatrix *C;
  hypre_ParcsrAdd(1.0, *A, 1.0, *B, &C);
  - hypre_MatvecCommPkgCreate(C);
  -
  return new HypreParMatrix(C);
  }
  