obsync: Depend on python-lxml on Debian derived platforms
obsync: Depend on python-lxml on Debian derived platforms

Signed-off-by: Wido den Hollander <be4891756a4fdc8c3c6609eb41e49789e971fe07@widodh.nl>
Signed-off-by: Sage Weil <6dd34506bbd5e58221bbb3e4732d97c91f02277b@newdream.net>

ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph