Add lxc3 compatibility to tests

lxc3 deprecates many legacy config keys [1].

[1] https://discuss.linuxcontainers.org/t/lxc-2-1-has-been-released/487

Depends-On: https://review.openstack.org/#/c/586898
Change-Id: I2947a633ea256460db4f43f7921d20d6dfec5aab

tests/group_vars/all_containers.yml

@@ -24,3 +24,11 @@ container_networks:
 physical_host: localhost
 properties:
   service_name: "{{ inventory_hostname }}"
+
+lxc2_container_config_list:
+  - 'lxc.aa_profile=unconfined'
+
+lxc3_container_config_list:
+  - 'lxc.apparmor.profile=unconfined'
+
+lxc_container_config_list: "{{ lookup('pipe', 'lxc-info --version || echo 2.0.0') is version_compare('3.0.0', 'lt') | ternary(lxc2_container_config_list, lxc3_container_config_list) }}"

tests/test-install-previous-neutron.yml

@@ -27,8 +27,7 @@
     - name: Use the unconfined aa profile
       lxc_container:
         name: "{{ container_name }}"
-        container_config:
-          - "lxc.aa_profile=unconfined"
+        container_config: "{{ lxc_container_config_list }}"
       delegate_to: "{{ physical_host }}"
 
     - name: Set mount path for kernel modules (Ubuntu)