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

plugins/lookup/k8s.py

@@ -194,12 +194,12 @@ RETURN = """
         type: complex
 """
 
+from ansible.errors import AnsibleError
+from ansible.module_utils.common._collections_compat import KeysView
 from ansible.plugins.lookup import LookupBase
 
 from ansible_collections.community.kubernetes.plugins.module_utils.common import K8sAnsibleMixin
 
-from ansible.errors import AnsibleError
-
 
 try:
     from openshift.dynamic import DynamicClient
@@ -253,6 +253,8 @@ class KubernetesLookup(K8sAnsibleMixin):
         if cluster_info == 'version':
             return [self.client.version]
         if cluster_info == 'api_groups':
+            if isinstance(self.client.resources.api_groups, KeysView):
+                return [list(self.client.resources.api_groups)]
             return [self.client.resources.api_groups]
 
         self.kind = kwargs.get('kind')