services: Defer service delete until all handles are closed

[Nikolay Sivov]

On 6/12/2014 01:32, Marvin wrote:
> Hi,
>
> While running your changed tests on Windows, I think I found new failures.
> Being a bot and all I'm not very good at pattern recognition, so I might be
> wrong, but could you please double-check?
> Full results can be found at
> https://testbot.winehq.org/JobDetails.pl?Key=7438
>
> Your paranoid android.
>
>
> === w7u (32 bit service) ===
> service.c:1381: Test failed: Something wrong in the calculation
> service.c:1417: Test failed: Active services mismatch 1
> The test timed out
I believe it's not related to a patch, only another open/close was added 
and some code handling Wine bug was removed.
I don't see how it can make it time out, especially since all other VMs 
are fine.