Allow user to provide flavor to use.
Allow user to provide flavor to use.

With this, you can use Ubuntu 11.10 machines with teuthology by saying::

  tasks:
  - ceph:
      flavor: oneiric
  ...

michaelsevilla/teuthology,robbat2/teuthology,ivotron/teuthology,dmick/teuthology,ceph/teuthology,SUSE/teuthology,tchaikov/teuthology,dreamhost/teuthology,dmick/teuthology,caibo2014/teuthology,dreamhost/teuthology,tchaikov/teuthology,SUSE/teuthology,ktdreyer/teuthology,zhouyuan/teuthology,yghannam/teuthology,zhouyuan/teuthology,michaelsevilla/teuthology,t-miyamae/teuthology,dmick/teuthology,caibo2014/teuthology,robbat2/teuthology,ceph/teuthology,ivotron/teuthology,yghannam/teuthology,SUSE/teuthology,ktdreyer/teuthology,t-miyamae/teuthology