DEV: Take 2 Queue jobs in tests by default.

On my machine this cuts the time taken to run our test suite
from ~11mins to ~9mins.

spec/requests/admin/users_controller_spec.rb

@@ -15,8 +15,6 @@ RSpec.describe Admin::UsersController do
       end
 
       it 'should able to disable the second factor for another user' do
-        SiteSetting.queue_jobs = true
-
         expect do
           put "/admin/users/#{user.id}/disable_second_factor.json"
         end.to change { Jobs::CriticalUserEmail.jobs.length }.by(1)