Feature Request: To provide a data source infoblox_ip_allocation that allows you to query if an IP is allocated for a specific fqdn

[johnnyf-hcp]

I have a use case where existing IPs have been allocated with DNS disabled. I would like to check if there is an existing IP allocated and the value before I try to do a new allocation using the infoblox_ip_allocation resource.

Right now I have an issue where multiple IPs are being created for the same fqdn as I am unable to check if an existing IP exists.