* bumping ceph-operator memory limit from 128Mi to 256Mi in order to
avoid OOMkills of the rook-ceph-operator pod
* updating documentation example for operator to denote a limit of 256Mi
instead of 128Mi
When upgrading from rook v1.1.7 to v1.2.0, the rook-ceph-operator pod
continued to get OOMKilled by the kubernetes scheduler. Manually
bumping this limit to something higher than 128Mi (I tried 256Mi and it
was good) prevented the OOMKills.
Signed-off-by: Jeff Billimek <jeff@billimek.com>