[MERGE] Merge branch 'stable-2.12' into stable-2.13

['Petr Pudlak' via ganeti-devel]

commit 0eff93d07c71dfce2219ba57860b76137d433b26
Merge: 63b4b76 437d77c
Author: Petr Pudlak <pud...@google.com>
Date:   Thu Mar 12 17:43:39 2015 +0100

    Merge branch 'stable-2.12' into stable-2.13
    
    * stable-2.12
      Fix issues when generating 'lens' version definitions
      Signal to the job queue when the cluster is gone