Set fail_mode explicitly

If OVS bridge was created via netplan prior to running neutron role,
then play would fail, as openvswitch_bridge would try to set fail_mode
to implicit None.

https: //github.com/ansible-collections/openvswitch.openvswitch/issues/86
Change-Id: I307ae755c21c8786e80bb224df89036d90d5e5ec

tasks/providers/setup_ovs_ovn.yml

@@ -58,6 +58,7 @@
 - name: Setup Network Provider Bridges
   openvswitch_bridge:
     bridge: "{{ bridge_mapping.split(':')[1] }}"
+    fail_mode: standalone
     state: present
   with_items: "{{ neutron_provider_networks.network_mappings.split(',') }}"
   loop_control: