Fix lack of support for Cumulus Linux with Hostname module in Ansible v2.8.0. (#57493)

(cherry picked from commit 1661c87bae)

changelogs/fragments/hostname_cumulus_linux_support.yaml

@@ -0,0 +1,2 @@
+bugfixes:
+  - hostname - Readded support for Cumulus Linux which broke in v2.8.0 (https://github.com/ansible/ansible/pull/57493)

lib/ansible/modules/system/hostname.py

@@ -637,6 +637,12 @@ class DebianHostname(Hostname):
     strategy_class = DebianStrategy
 
 
+class CumulusHostname(Hostname):
+    platform = 'Linux'
+    distribution = 'Cumulus-linux'
+    strategy_class = DebianStrategy
+
+
 class KaliHostname(Hostname):
     platform = 'Linux'
     distribution = 'Kali'