Add log_config_append option

Add log_config_append option to cinder controller on Pike

Change-Id: Ib845a6123e1687faaaa0e770825203ffcb1f84cc
Related-Prod: PROD-23079 (PROD:23079)
diff --git a/cinder/files/pike/cinder.conf.controller.Debian b/cinder/files/pike/cinder.conf.controller.Debian
index 4a5ead5..5501ae8 100644
--- a/cinder/files/pike/cinder.conf.controller.Debian
+++ b/cinder/files/pike/cinder.conf.controller.Debian
@@ -94,6 +94,10 @@
 volumes_dir = /var/lib/cinder/volumes
 log_dir=/var/log/cinder
 
+{%- if controller.logging.log_appender %}
+log_config_append=/etc/cinder/logging.conf
+{%- endif %}
+
 # Use syslog for logging. (boolean value)
 #use_syslog=false