reenable 100Hz timer test on windows

[mikaelarguedas]

now that we have better time resolution on windows these tests can be restored.

Unfortunately the 1kHz timer tests still fail and have to stay disabled.

• Windows (rclpy tests ranusing --retest-until-fail 50)

[serge-nikulin]

Unfortunately the 1kHz timer tests still fail and have to stay disabled.

Have you enabled 1KHz switching in Windows from the default 15ms or so?
AFAIK, MS has introduced this feature for gamers and it might help you.

[mikaelarguedas]

@serge-nikulin Thanks for the tip,
I don't think we changed anything explicitly. Though if the default resolution is 15.6ms I would expect our 100Hz tests to fail, at least sporadically. I'll merge this for now and post an update here when I find time to explore that lead.

[serge-nikulin]

See https://msdn.microsoft.com/en-us/library/windows/desktop/dd757624(v=vs.85).aspx.
Call timeBeginPeriod at the startup time and don't bother to call timeEndPeriod at all.
A lot of airport security equipment around the world works in this mode for many years, non-stop, 24/365 :)

[mikaelarguedas]

Good to know, thanks for the pointer