Add support to restart unbound with systemd

Adds support for Fedora.

Change-Id: Ide7a63d070dac07b276dfa55da8db2ff089f1e71
Prevent tripleo-bm-test network from setting DNS

On reboot DNS was being set to the IP of the test network dhcp. It
should be the DNS server set by the default network.

Change-Id: I6cc793f26e585e094914b666cdbd06b60b6fae3a
Merge "Add support to restart unbound with systemd"
Merge "Prevent tripleo-bm-test network from setting DNS"