[libvirt] [test-API][PATCH V2] Add blockjob related test functions and cases

[Jincheng Miao]

----- Original Message -----
> I know the reason, the fix to the issue can be found in another patch.
> One thing you should notice, every patch should not break the running of
> existed testcases.
> If this patch is based on other patch. you should send the two patches
> in a set.

OK, I will send a V3 patch set includes these two patches.

Thanks for your review.

> 
> Guannan
>