Multinode Magnum missing changes

Added missing routing from controllers back to seed node.
Enabled Magnum, added config.

Author: darmach

etc/kayobe/environments/ci-multinode/inventory/group_vars/controllers/network-interfaces

@@ -12,6 +12,11 @@ tunnel_interface: "{{ vxlan_interfaces[0].device }}.{{ tunnel_vlan }}"
 
 public_interface: "{{ vxlan_interfaces[0].device }}.{{ public_vlan }}"
 
+public_routes:
+  - cidr: "{{ external_cidr }}"
+    gateway: "{{ public_allocation_pool_start }}"
+
+
 ###############################################################################
 # Dummy variable to allow Ansible to accept this file.
 workaround_ansible_issue_8743: yes

etc/kayobe/environments/ci-multinode/kolla.yml

@@ -4,3 +4,4 @@ kolla_enable_cinder_backup: true
 kolla_enable_neutron_provider_networks: true
 kolla_enable_ovn: true
 kolla_enable_octavia: true
+kolla_enable_magnum: true

etc/kayobe/environments/ci-multinode/kolla/config/magnum.conf

@@ -0,0 +1,2 @@
+[trust]
+cluster_user_trust = true