Added dumpling v0.67.9 version, removed older versions v0.67.2, v0.67.4, v0.67.8
This will reduce number of tests to run, some  may failed on old versions, see http://tracker.ceph.com/issues/8409

Signed-off-by: Yuri Weinstein <yuri.weinstein@inktank.com>
Merge pull request #35 from ceph/wip-add-v0.67.9

Added dumpling v0.67.9 version, removed older versions v0.67.2, v0.67.4,...