Tweak timing to reduce spurious failures

Empirically, scheduling delays in our environment can exceed 100ms.
On the other hand, we should not wake up early.

Adjust test_sleep... tolerances correspondingly.

Adjust TimerTest repeat intervals up, and expected completion
counts correspondingly down, so we need to be scheduled less
often to complete successfully.

test_joinJI allowed for a reasonable delay, but we still saw it
miss by 70 msecs. Allow another 100 msecs.

Bug: 144220620
Test: TreeHugger
Change-Id: I86b693ee33113ca77fdceb829b41ca109c0a83cd
2 files changed