Fix Importing IPAddress.role

[snaselj]

Closes: NaN

What's Changed

• Fixed importing IPAddress.role field.
• Fixed issue, when importing different roles with the same name, e.g. RackRole with name = "Network" and DeviceRole with name = "Network".
• Added auto adding identifiers to fields.
• Fixed getting pk when target provided in import_record.

Notes

Divided into separate commits to review.

Based on: https://github.com/nautobot/nautobot-app-netbox-importer/pull/130#issuecomment-1956373330

[snaselj]

Fixed an issue, when importing different roles with the same name, e.g. RackRole with name = "Network" and DeviceRole with name = "Network".

Based on this: https://github.com/nautobot/nautobot-app-netbox-importer/pull/130#issuecomment-1959192069

Pull request is ready for review @glennmatthews .