Nitpicking.
Determine if we should manage a devices IP.

Based on the hotspot the device type belongs to, we can determine if we
should manage the IP address of the device or not.
Add renew and release methods devices.

This enables easy assigning on IP address based on the membership network.
Add a default network for membership levels without a defined network.
Configure rspec.
Assign IP Adresses to new devices
Add input for INET type
Merge branch 'feature/ip-management' into develop
Add some helper methods to admin to renew/release ip addresses.