weave: Upgrade to 2.4.0

Upstream Changes:

-   weave 2.4.0 (https://github.com/weaveworks/weave/releases/tag/v2.4.0)
-   Support `externalTrafficPolicy: Local` (https://github.com/weaveworks/weave/issues/2924)
-   Make the ipset list size bigger (https://github.com/weaveworks/weave/pull/3305)
-   Break out of kube rm-peers loop if nothing changes (https://github.com/weaveworks/weave/pull/3317)

Our Changes:

-   Revamp weave-net.yml.j2 with upstream changes
-   Add more variables for customization
-   Replace WEAVE_PASSWORD with k8s secret
-   Remove hard-corded seed mode support, in favor of variables customization

roles/network_plugin/weave/tasks/main.yml

@@ -1,12 +1,4 @@
 ---
-- import_tasks: seed.yml
-  when: weave_mode_seed
-
-- name: template weavenet conflist
-  template:
-    src: 00-weave.conflist.j2
-    dest: /etc/cni/net.d/00-weave.conflist
-    owner: kube
 
 - name: Weave | Copy cni plugins from hyperkube
   command: "{{ docker_bin_dir }}/docker run --rm -v /opt/cni/bin:/cnibindir {{ hyperkube_image_repo }}:{{ hyperkube_image_tag }} /bin/cp -rf /opt/cni/bin/. /cnibindir/"
@@ -19,9 +11,12 @@
     - hyperkube
     - upgrade
 
-- name: Weave | Create weave-net manifest
+- name: Weave | Create manifest
   template:
     src: weave-net.yml.j2
     dest: "{{ kube_config_dir }}/weave-net.yml"
-    mode: 0640
-  register: weave_manifest
+
+- name: Weave | Fix nodePort for Weave
+  template:
+    src: 00-weave.conflist.j2
+    dest: /etc/cni/net.d/00-weave.conflist