Updates in CSRSparsity

In CSRSparsity module implement following method:

```fortran 
 INTERFACE GetSym
  MODULE SUBROUTINE obj_GetSym2(obj, from)
    TYPE(CSRSparsity_), INTENT(INOUT) :: obj
    CHARACTER(1), INTENT(IN) :: from
  END SUBROUTINE obj_GetSym2
END INTERFACE GetSym
```
