Add configure_timeout attribute for the wsus_server_subscription :configure action

[martinheg]

Somewhat crude solution for #13 to allow for the timeout for the :configure action of the wsus_server_subscription provider to be set through an attribute.
I was seeing the same problem identified in the issue whereby the category synchronisation was not completing within the 300 seconds hardcoded by the powershell_out64 method.
This solution sets the default timeout for powershellout_64 as 300 seconds, but allows for that to be overridden.
In the case of wsus_server_subscription I pull that timeout from an attribute (which itself is defaulted to 900 seconds).

[Annih]

Hello @martinheg thanks for your nice contribution :)
Indeed, this seems to fix #13, I'll just perform some tests today before merging.

[kamaradclimber]

lgtm

[Annih]

Ok for me, but keep in mind that the powershell implementation might be removed when #12 will be implemented.

Thanks again @martinheg !

[martinheg]

Yep, 👍 . Thanks @Annih