influxdb: default hostname to localhost (#34117)

lib/ansible/module_utils/influxdb.py

@@ -40,7 +40,7 @@ class InfluxDb():
     @staticmethod
     def influxdb_argument_spec():
         return dict(
-            hostname=dict(required=True, type='str'),
+            hostname=dict(default='localhost', type='str'),
             port=dict(default=8086, type='int'),
             username=dict(default='root', type='str'),
             password=dict(default='root', type='str', no_log=True),

lib/ansible/utils/module_docs_fragments/influxdb.py

@@ -10,7 +10,8 @@ options:
   hostname:
     description:
     - The hostname or IP address on which InfluxDB server is listening
-    required: true
+    - Since version 2.5, defaulted to localhost.
+    default: localhost
   username:
     description:
     - Username that will be used to authenticate against InfluxDB server