Use LOG.warning instead of deprecated LOG.warn

The LOG.warn method is deprecated[1] and the LOG.warning method should
be used instead.

[1] https://docs.python.org/3/library/logging.html#logging.warning

Change-Id: I455bb6662b3ccc36b856e923e7220e357e8ef48f

keystone/Chart.yaml

@@ -14,7 +14,7 @@ apiVersion: v1
 appVersion: v1.0.0
 description: OpenStack-Helm Keystone
 name: keystone
-version: 0.2.26
+version: 0.2.27
 home: https://docs.openstack.org/keystone/latest/
 icon: https://www.openstack.org/themes/openstack/images/project-mascots/Keystone/OpenStack_Project_Keystone_vertical.png
 sources:

keystone/templates/bin/_fernet-manage.py.tpl

@@ -88,7 +88,7 @@ def read_from_files():
     if len(list(keys)):
         LOG.debug("Keys read from files: %s", keys)
     else:
-        LOG.warn("No keys were read from files.")
+        LOG.warning("No keys were read from files.")
     return data
 
 

releasenotes/notes/keystone.yaml

@@ -42,4 +42,5 @@ keystone:
   - 0.2.24 Remove unused admin port in keystone
   - 0.2.25 Migrated CronJob resource to batch/v1 API version & PodDisruptionBudget to policy/v1
   - 0.2.26 Add Xena and Yoga values overrides
+  - 0.2.27 Use LOG.warning instead of deprecated LOG.warn
 ...