Set debug level for django.template to INFO

As stated in related bug - with DEBUG level of logging,
there are some false positive traces in horizon log in Pike.

Change-Id: Ie9c85c421366dc0cd1ad18f30f25e00ecb7f8d05
Related-Prod: https://mirantis.jira.com/browse/PROD-17558
diff --git a/horizon/files/horizon_settings/_horizon_settings.py b/horizon/files/horizon_settings/_horizon_settings.py
index 144b51e..4c0faf6 100644
--- a/horizon/files/horizon_settings/_horizon_settings.py
+++ b/horizon/files/horizon_settings/_horizon_settings.py
@@ -75,6 +75,15 @@
             'handlers': ['null'],
             'propagate': False,
         },
+        {%- if server.version not in ['juno', 'liberty', 'kilo', 'mitaka', 'newton', 'ocata'] %}
+        # DEBUG level for django.template starting Pike has some false positive traces, set it to INFO
+        # by default. Caused by bug PROD-17558.
+        'django.template': {
+            'handlers': ['file'],
+            'level': 'INFO',
+            'propagate': True,
+        },
+        {%- endif %}
         'requests': {
             'handlers': ['null'],
             'propagate': False,