Description of problem: 'The service is starting or stopping. Please try again later.'

Complete log as follwoing.
currently, qga service stop/start operations expose an old problem:
23:48:44 DEBUG| [stderr] INFO:root:Context: Repeat: 60/100
23:48:44 DEBUG| [stderr] INFO:root:Context: Repeat: 60/100 --> Try to stop qemu-ga service.
23:48:44 DEBUG| [stderr] DEBUG:aexpect.client:Sending command: net stop qemu-ga
23:49:04 DEBUG| [stderr] DEBUG:aexpect.client:Sending command: echo %errorlevel%
23:49:05 DEBUG| [stderr] INFO:root:Context: Repeat: 60/100 --> Try to start qemu-ga service.

23:49:05 DEBUG| [stderr] DEBUG:aexpect.client:Sending command: net start qemu-ga

23:49:05 DEBUG| [stderr] DEBUG:aexpect.client:Sending command: echo %errorlevel%

23:49:06 ERROR|
... ...
... ...

... ...
... ...
23:49:06 ERROR| raise exceptions.TestFail(message)
23:49:06 ERROR| avocado.core.exceptions.TestFail: Could not start qemu-ga service in VM 'avocado-vt-vm1',detail: 'The service is starting or stopping. Please try again later.

Version-Release number of selected component (if applicable):

How reproducible:
2/10 ~ 3/10

Steps to Reproduce:
1. boot up windows guest
2. install qga service
3. stop/start via command `net stop/start qemu-ga service`

Actual results:
service start failed.

Expected results:
service start successfully.

Additional info:
open a low priority bug here as a tracker after confirming with dev.