Commands in the Ceph driver are directed at the mon
daemon instead of at the mgr daemon.
The driver's rados_command() calls json_command() and,
by default, json_command() calls the python
rados client's mon_command() instead of mgr_command().
By passing the target as mon-mgr, the python rados
client's mgr_command() is called as desired, and we
avoid the need of extra MON write caps.
Co-Authored-By: Victoria Martinez de la Cruz <email@example.com>
Co-Authored-By: Ramana Raja <firstname.lastname@example.org>
Co-Authored-By: Tom Barron <email@example.com>
(cherry picked from commit