use remoto for the mon_host status check

Signed-off-by: Alfredo Deza <alfredo.deza@inktank.com>
vendorize execnet and remoto

Signed-off-by: Alfredo Deza <alfredo.deza@inktank.com>
update tox to run tests for ceph-deploy only

Signed-off-by: Alfredo Deza <alfredo.deza@inktank.com>
remove pushy from attempting to start the mons

Signed-off-by: Alfredo Deza <alfredo.deza@inktank.com>
close the pushy connection before calling status

Signed-off-by: Alfredo Deza <alfredo.deza@inktank.com>