fix version used to conditionally include nova-clear-rabbit-queues

* comparison be changed to $older_than_eq('2014.1.99999') to capture any
  reasonable number of versions of stable/icehouse which may come in the
  future without having to change this code each time

Change-Id: I3a307b5a3badba3513be88917ab68e5152163711
Closes-bug: 1350752
Merge "fix version used to conditionally include nova-clear-rabbit-queues"