Rename iops to iops_limit
Rename iops to iops_limit

Addresses-Issue: Jira/AQUILON-1854
Change-Id: Ie768430e3ab8125b3fc74ecd5983cd2fe0628b0d
Reviewed-by: Gabor Gombas <3bb8c49439d9d044594e1c6967f991d0b4248a64@morganstanley.com>

quattor/aquilon-protocols,quattor/aquilon-protocols