Manage interfaces and update dependency check

Setup bridge networking, install useful packages and fix Ansible
dependency check.

roles/base/templates/bridged-interface.cfg

@@ -0,0 +1,14 @@
+# {{ ansible_managed }}
+
+# The loopback network interface
+auto lo
+iface lo inet loopback
+
+# The primary network interface
+auto br1
+iface br1 inet static
+   address {{ ip_addr }}
+   gateway {{ ip_gateway }}
+   bridge_ports {{ ip_inter }}
+   bridge_stp on
+   ethernet-wol g