Description of your changes:
Fix security issues identified by TrailOfBits
Modifications in osd/status.go:
I opted by remove the offending variables because "c.checkNodesCompleted"
provides this variables always, so no need to initialize them.
var was not used, so i have replaced it by the blank identifier.
Modifications in machinelabel/add.go:
I have followed the same criteria used in other disruption packages,
and return the error if it is produced when we try to "watch" machines.
Closes: https://github.com/rook/rook/issues/4565
[test ceph]
Signed-off-by: Juan Miguel Olmo Martínez <jolmomar@redhat.com>