Admin: option to export registrar user and ip information to csv

[vohmar]

Related to : internetee/registrar_center2#93

Currently there is no way for registrar to check on their users and ip addresses for accessing .ee registry and furthermore there is also no easy way of registry admin to export this information for sharing with the registrar.

Please add an option to admin interface to download the list of users and allow-list ip addresses to a csv file

/admin/registrars/[ID]

The csv file(s) should include

• users of the registrar (username, status (active: true/false), permissions(super/epp/billing) and certificate info (incl validity)
• the whitelisted IPs of the registrar (ipv4, ipv6, interfaces (api/registrar)