Make wuaserv service be idempotent

Every time the puppet agent runs, it does this:

• Resource:

  /Stage[main]/Wsus_client/Service[wuauserv]/ensure

• Message:

  ensure changed 'stopped' to 'running'

Looking at the code results in a few possibilities as to the cause for this:

1. The Registry_value resource causes the service to refresh
   • I don't think this is the case, because if it was, then I would see a change by this resource in the report for this Puppet run
2. The service resource in Windows doesn't allow idempotence (or maybe this is specific to the wuaserv service)
   • This seems silly (but I wouldn't put it passed Microsoft)
   • Maybe something could be added to the service resource to help the host know not to always stop/start the service
3. A workaround may be required to check if the service is already running
   • This shouldn't be required as that's the job of the service resource (but just noting it here to share my thoughts)