CI: adapt packet-ci role to act as a molecule provisioner

To work with molecule, we need to use the name provided by molecule_yml
in inventory.

Inject the name in the VirtualMachineInstance (with a default to handle
non-molecule scenario) and get it back as part of inventory).

Account for no ansible groups

tests/cloud_playbooks/roles/packet-ci/tasks/main.yml

@@ -1,11 +1,14 @@
 ---
 - name: Include custom vars for ci job
   include_vars: "../files/{{ ci_job_name }}.yml"
+  when: molecule_yml is not defined
 
 - name: Start vms for CI job
   kubernetes.core.k8s:
     definition: "{{ lookup('template', 'vm.yml.j2', template_vars=item) }}"
   loop: "{{ cluster_layout }}"
+  loop_control:
+    index_var: index
 
 - name: Wait for vms to have IP addresses
   kubernetes.core.k8s_info:
@@ -24,17 +27,17 @@
 - name: Massage VirtualMachineInstance data into an Ansible inventory structure
   vars:
     ips: "{{ vmis.resources | map(attribute='status.interfaces.0.ipAddress') }}"
-    names: "{{ vmis.resources | map(attribute='metadata.name') }}"
-    _groups: "{{ vmis.resources | map(attribute='metadata.annotations.ansible_groups') | map('split', ',') }}"
+    names: "{{ vmis.resources | map(attribute='metadata.annotations.inventory_name') }}"
+    _groups: "{{ (vmis.resources | map(attribute='metadata.annotations.ansible_groups') | map('split', ','))}}"
     hosts: "{{ ips | zip(_groups, names)
-                | map('zip', ['ansible_host', 'ansible_groups', 'k8s_vmi_name'])
+                | map('zip', ['ansible_host', 'ansible_groups', 'inventory_name'])
                 | map('map', 'reverse') | map('community.general.dict') }}"
   loop: "{{ hosts | map(attribute='ansible_groups') | flatten | unique }}"
   set_fact:
     ci_inventory: "{{ ci_inventory|d({}) | combine({
                     item: {
                       'hosts': hosts | selectattr('ansible_groups', 'contains', item)
-                                     | rekey_on_member('k8s_vmi_name')
+                                     | rekey_on_member('inventory_name')
                       }
                     })
                   }}"