Move roles from inside fgci-ansible repo to their own git repos

[martbhell]

Blocked by authors of these roles? The roles:

• Dns
• Ip_forwarder: https://github.com/CSC-IT-Center-for-Science/ansible-role-ip-forwarder
• Network_interface: https://github.com/CSC-IT-Center-for-Science/network_interface
• Provision_vm: https://github.com/CSC-IT-Center-for-Science/ansible-role-provision-vm

[martbhell]

Added links to the public URLs of the roles. Only one missing right now is the DNS one. But this issue can now proceed.