raise SystemExit when monitors have not formed quorum

Signed-off-by: Alfredo Deza <alfredo.deza@inktank.com>
Merge pull request #155 from alfredodeza/7240

raise SystemExit when monitors have not formed quorum
bump the remoto requirement

Signed-off-by: Alfredo Deza <alfredo.deza@inktank.com>
make sure ceph.conf is 0644

Signed-off-by: Alfredo Deza <alfredo.deza@inktank.com>
Merge pull request #156 from alfredodeza/6825

correctly set permissions when writing configuration files