Make Sidekiq Web UI test less flaky
What does this MR do and why?
One of the Sidekiq Web UI test attempts to test that the latency shown in the queues page is 0.0. However, if there is some slowness on the runner the latency could tick up to a second, causing the test to fail.
Avoid this flakiness by stubbing Time.now
so that we guarantee that the latency will always remain at 0.
Relates to #460842 (closed)
Edited by Stan Hu