Calico: fix peering with routers for new version

In new `calicoctl` version nodes peering with routers is broken.
We need to use predictable node names for calico-node and the
same names in calico `bgpPeer` resources and CNI.

roles/network_plugin/calico/templates/calico-node.service.j2

@@ -8,6 +8,7 @@ EnvironmentFile=/etc/calico/calico.env
 ExecStartPre=-/usr/bin/docker rm -f calico-node
 ExecStart=/usr/bin/docker run --net=host --privileged \
  --name=calico-node \
+ -e HOSTNAME=${CALICO_HOSTNAME} \
  -e IP=${CALICO_IP} \
  -e IP6=${CALICO_IP6} \
  -e CALICO_NETWORKING_BACKEND=${CALICO_NETWORKING_BACKEND} \