tarbal: kill lingering ceph-mon / ceph-osd

tarbal: kill lingering ceph-mon / ceph-osd

When a make check fails it is entirely possible that ceph-osd remain,
because they have their own process group. Kill whatever ceph-osd or
ceph-mon are left behind.

We kill ceph-osd / ceph-mon regardless of the success / failure status
of make check because we also want to address the case where a test
pretends to succeed but left daemons behind.

http://tracker.ceph.com/issues/11929 Fixes: #11929

Signed-off-by: Loic Dachary <ldachary@redhat.com>