* Reduce overhead to refire events
- asyncio timers can fire early for a varity of reasons including
poor clock resolution and performance. To solve this problem
we re-arm async_track_point_in_utc_time and try again later
when this happens.
- On some platforms this means the async_track_point_in_utc_time can
end up trying many times to prevent firing the timer early since as
soon as it rearms it fires again and this repeats until we reach
the appointed time. While there is not much we can do to prevent
asyncio from firing the timer callback early, we can reduce the
overhead when this happens by using avoiding creating datetime
objects
* tweak mocking
* -vvv
* fix time freeze being too broad in litterrobot
* adjust
Jan-Philipp Benecke
Erik Montnemery
J. Nick Koston
Dave T
Nathan Spencer