fix sudoku example test errors

[MeerKatDev]

Minimal changes to make tests for sudoku work, as in issue #311

[MeerKatDev]

I wonder if instead of initialize... there should be

  @method update(sudokuInstance: Sudoku) {

to manually initialize the sudoku hash.

[mitschabaude]

I actually want to make it work with init(), but I think it'll need a change to the CLI's deploy logic

[MeerKatDev]

but init() does not take arguments, how do you pass the hash() from sudokuInstance ?

[mitschabaude]

yeah @MeerKatDev I just realized this as well. will go with update() as you suggested :D

[mitschabaude]

thanks for making this PR and highlighting what needs to be fixed! I ended up inlcuding this as part a larger PR (#315), so closing this one