Configure qemu when Calico network type is set

Previously the qemu.conf was being configured by the Calico tasks
in Neutron, which is improper as Neutron is not managing the
libvirt/qemu installation.

Change-Id: Id2cfa3353543fecd55f1135abad89f07071e2f60

tasks/nova_compute_kvm.yml

@@ -47,7 +47,9 @@
     owner: "root"
     group: "root"
     mode: "0600"
-  when: qemu_conf_dict is defined
+  when:
+    - qemu_conf_dict is defined
+      or nova_network_type == 'calico'
   notify: Restart libvirt-bin
   tags:
     - nova-kvm

templates/qemu.conf.j2

@@ -1,4 +1,20 @@
 # {{ ansible_managed }}
+
+{% if nova_network_type == 'calico' %}
+# Calico specific qemu settings
+# Information available at:
+# http://docs.projectcalico.org/en/latest/ubuntu-opens-install.html
+clear_emulator_capabilities = 0
+user = "root"
+group = "root"
+cgroup_device_acl = [
+     "/dev/null", "/dev/full", "/dev/zero",
+     "/dev/random", "/dev/urandom",
+     "/dev/ptmx", "/dev/kvm", "/dev/kqemu",
+     "/dev/rtc", "/dev/hpet", "/dev/net/tun",
+]
+{% endif %}
+
 {% for key, value in qemu_conf_dict.iteritems() %}
 {{ key }} = {{ value }}
 {% endfor %}