Merge "Ubuntu: support systemd-networkd"

ansible/filter_plugins/networkd.py

ansible/group_vars/all/network

ansible/roles/network-debian/handlers/main.yml

ansible/roles/network-debian/tasks/main.yml

doc/source/configuration/reference/network.rst

doc/source/contributor/automated.rst

kayobe/plugins/filter/networkd.py

kayobe/tests/unit/plugins/filter/test_networkd.py

...oks/kayobe-overcloud-host-configure-base/overrides.yml.j2

...ost-configure-base/tests/test_overcloud_host_configure.py

requirements.yml

roles/kayobe-network-bootstrap/tasks/Debian.yml

roles/kayobe-network-bootstrap/tasks/RedHat.yml

roles/kayobe-network-bootstrap/tasks/main.yml