Pure-Rails timefreeze and flaky-ness removal for all specs

spec_helper.rb

RSpec.configure do |config|
  # Freeze time and truncate microseconds in all examples.
  config.around(:each) do |example|
    # Truncate microseconds to avoid test flakiness when the DB truncates microseconds
    now_without_microseconds = Time.now.in_time_zone.change(usec: 0)
    travel_to(now_without_microseconds) do
      example.run
    end
  end
end