misc: add cluster param to skeleton_config
misc: add cluster param to skeleton_config

We need to consider all monitors to allocate unique ips in get_mons(),
but generate the conf file per-cluster.

Signed-off-by: Josh Durgin <1442af5e32b56bc0fa9c40ad9e4d67aeb05f1e26@redhat.com>

SUSE/teuthology,dmick/teuthology,dmick/teuthology,SUSE/teuthology,ktdreyer/teuthology,ceph/teuthology,dmick/teuthology,ktdreyer/teuthology,SUSE/teuthology,ceph/teuthology