test: Drop cockpit-ws* groups

README.md

@@ -212,7 +212,8 @@ assuming your machines are joined to a FreeIPA domain.
           - name: monger-cockpit
             dns: ['localhost', 'www.example.com']
             ca: ipa
-            group: cockpit-ws
+            # with Cockpit < 257 (RHEL 7) you need:
+            # group: cockpit-ws
 ```
 
 Note: Generating a new certificate using the `certificate` system role in the playbook remains supported.
@@ -235,7 +236,8 @@ This example also installs Cockpit with an IdM-issued web server certificate.
           - name: /etc/cockpit/ws-certs.d/monger-cockpit
             dns: ['localhost', 'www.example.com']
             ca: ipa
-            group: cockpit-ws  # or cockpit-wsinstance on newer cockpit versions
+            # with Cockpit < 257 (RHEL 7) you need:
+            # group: cockpit-ws
 ```
 
 NOTE: The `certificate` role, unless using IPA and joining the systems to an IPA domain,

tests/tasks/get_cockpit_group.yml

@@ -1,13 +1,11 @@
 # SPDX-License-Identifier: MIT
 ---
-- name: Get name of cockpit group for tests
-  getent:
-    database: group
-    key: cockpit-wsinstance
-    fail_key: false
 
+# The ownership of the certificate hasn't mattered since Cockpit 257,
+# which is in RHEL 8.7, 9.0, and all current Fedora/Debian/Ubuntu OSes.
+# This only matters for RHEL 7
 - name: Set __cockpit_test_group
   set_fact:
-    __cockpit_test_group: "{{ 'cockpit-wsinstance'
-      if ansible_facts['getent_group'].get('cockpit-wsinstance')
-      else 'cockpit-ws' }}"
+    __cockpit_test_group: "{{ 'cockpit-ws'
+      if (ansible_facts['os_family'] == 'RedHat' and ansible_facts['distribution_version'] | int == 7)
+      else 'root' }}"