Wip 9710

Fixes http://tracker.ceph.com/issues/9710
Reduced amount of jobs run by this suite to 30.
Added '+' to workload and removed rgw task from switf workload.

Tested for 2 parallel and 2 stress-split jobs:
http://pulpito.front.sepia.ceph.com/teuthology-2014-10-29_16:30:53-upgrade:dumpling-x-firefly-distro-basic-vps/
http://pulpito.front.sepia.ceph.com/teuthology-2014-10-29_16:40:14-upgrade:dumpling-x-firefly-distro-basic-vps/

@tmuthamizhan Pls review