Fix flaky timing tests. Timing is not always exactly accurate.
See:
def test_timer_sets_last():
with Timer() as t:
time.sleep(0.02)
>       assert t.last >= 0.02
E       AssertionError: assert 0.019503600000000176 >= 0.02
E        +  where 0.019503600000000176 = Timer(name=None, text='Elapsed time: {:0.4f} seconds', logger=<built-in function print>).last
tests\utils\statistics\test_timer.py:170: AssertionError
@@ -167,7 +167,7 @@ def test_last_starts_as_nan():
def test_timer_sets_last():
with Timer() as t:
time.sleep(0.02)
- assert t.last >= 0.02
+ assert t.last >= 0.015
def test_timers_cleared():
