Adopt output structure to new collections version

With commit [1] to collection output structure of networks_info module
has been changed. With that we adpot to the new format.

Return values for keypair have also changed

[1] 9272146cf7

Depends-On: https://review.opendev.org/c/openstack/openstack-ansible/+/864553
Change-Id: Ic22ec379983e43aa5f2b55fd4543b4aa70762354

tasks/octavia_keypair.yml

@@ -33,7 +33,7 @@
 
 - name: Write private key locally
   copy:
-    content: "{{ _octavia_keypair.key.private_key }}"
+    content: "{{ _octavia_keypair['keypair']['private_key'] }}"
     dest: "{{ lookup('env', 'HOME') }}/.ssh/{{ octavia_ssh_key_name }}"
   delegate_to: localhost
   when:

tasks/octavia_post_install.yml

@@ -98,7 +98,7 @@
 
     - name: Set Octavia management network UUID fact
       set_fact:
-        octavia_neutron_management_network_uuid: "{{ get_net_info.openstack_networks[0].id }}"
+        octavia_neutron_management_network_uuid: "{{ get_net_info.networks[0].id }}"
 
 - name: Set octavia_amp_image_owner_id if it is not already set
   delegate_to: "{{ octavia_service_setup_host }}"