When using redfish for BMC control, certificates will always be validated regardless of the `redfish_verify_ssl` option.

if I comment out line 6 from `/usr/share/foreman-proxy/modules/bmc/bmc_plugin.rb`, the value specified in `bmc.yml` is respected.
That line reads:

validate :redfish_verify_ssl, :boolean => true

As I understand it, most redfish users do not have valid certs on their BMCs. This issue effects most users of redfish.