Fix upgrade for all daemonset type resources

Daemonsets cannot be simply upgraded through a single API call,
regardless of any kubectl documentation. The resource must be
purged and then recreated in order to make any changes.

roles/kubernetes-apps/network_plugin/weave/tasks/main.yml

@@ -1,3 +1,16 @@
+#FIXME: remove if kubernetes/features#124 is implemented
+- name: Weave | Purge old weave daemonset
+  run_once: true
+  kube:
+    name: "weave-net"
+    kubectl: "{{ bin_dir }}/kubectl"
+    filename: "{{ kube_config_dir }}/weave-net.yml"
+    resource: "ds"
+    namespace: "{{system_namespace}}"
+    state: absent
+  when: inventory_hostname == groups['kube-master'][0] and weave_manifest.changed
+
+
 - name: Weave | Start Resources
   run_once: true
   kube: