Fix weave on RHEL deployment

Reduce retry delay checking weave
Always load br_netfilter module

roles/network_plugin/weave/tasks/main.yml

@@ -1,6 +1,11 @@
 ---
 - include: pre-upgrade.yml
 
+- name: Weave | enable br_netfilter module
+  modprobe:
+    name: br_netfilter
+    state: present
+
 - 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 -r /opt/cni/bin/. /cnibindir/"
   register: cni_task_result