Allow tenants to resolve ip from hostnames

[sironrod]

Is your feature request related to a problem? Please describe.
I can not resolve hosts from tenant when try to setup openId

Describe the solution you'd like
We can add on tenant.yaml hostAliases to applied them to the StatefulSet in order for the tenant pod resolved the hosts.

Describe alternatives you've considered
Another way is to support l dnsPolicy and dnsConfig on the tenant.yaml. All this can also be configure from the operator console