yamllint: All tasks need to be named

yamllint is failing for unnamed tasks. All block and include_tasks tasks
are now named.

tests/netgroup/test_netgroup_member_absent.yml

@@ -5,7 +5,8 @@
   gather_facts: no
 
   tasks:
-  - block:
+  - name: Test netgroup member absent
+    block:
     - name: Get Domain from server name
       ansible.builtin.set_fact:
         ipaserver_domain: "{{ ansible_facts['fqdn'].split('.')[1:] | join ('.') }}"