Default to 3 mons when no `mon.count` is given.
The documentation and upgrade page has been updated accordingly to reflect the new
default.
Signed-off-by: Alexander Trost <galexrt@googlemail.com>
This introduces a MonSpec to the Ceph Cluster CRD which contains settings for
mons, current options are the count and if more than one mon is allowed
to run per node.
Fixes#1386
Signed-off-by: Alexander Trost <galexrt@googlemail.com>