Handle set object retrieved from lookup plugin (#118)

api_groups is returned as "dict_keys()" which k8s lookip plugin does not handle.
Typecasting with list make it available to default callback plugin.

molecule/default/tasks/full.yml

@@ -185,6 +185,13 @@
           metadata:
             name: testing1
 
+    ### https://github.com/ansible-collections/community.kubernetes/issues/111
+    - set_fact:
+        api_groups: "{{ lookup('k8s', cluster_info='api_groups') }}"
+
+    - debug:
+        var: api_groups
+
     - name: Namespace should exist
       k8s_info:
         kind: Namespace