Wip 9424 - first draft upgrade/giant-x suite

Pls don't merge it for now it's still wip.

@dachary can you take a look at 'stress-split-erasure-code' part ?

here are some test runs results for it:

http://pulpito.front.sepia.ceph.com/teuthology-2014-11-11_14:22:27-upgrade:giant-x:stress-split-erasure-code-next-distro-basic-vps/
http://pulpito.front.sepia.ceph.com/teuthology-2014-11-05_18:18:17-upgrade:giant-x:stress-split-erasure-code-next-distro-basic-vps/

@tmuthamizhan pls review and comment

Signed-off-by: Yuri Weinstein yuri.weinstein@inktank.com