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/groups_controller_spec.rb

@@ -496,7 +496,6 @@ describe GroupsController do
       before do
         user.update_attributes!(admin: true)
         sign_in(user)
-        SiteSetting.queue_jobs = true
       end
 
       it 'should be able to update the group' do