ifix netle install: reverse if version = 12.04 to != 12.04 (I guess it is the initial intention)

fix ssh-server install: start servce after installation (else it doesn't start in ubuntu 14.04 at least)



git-svn-id: http://svn.eurecom.fr/openair4G/trunk@6039 818b1a75-f10b-46b9-bf7c-635c3b92a50f