[RIL-1032] Allow 'bootable' query

Allows to query volumes for non-admin users by bootable flag
diff --git a/cinder/files/liberty/cinder.conf.controller.Debian b/cinder/files/liberty/cinder.conf.controller.Debian
index 53b1296..1ef6ec0 100644
--- a/cinder/files/liberty/cinder.conf.controller.Debian
+++ b/cinder/files/liberty/cinder.conf.controller.Debian
@@ -87,6 +87,8 @@
 notification_driver = messagingv2
 {%- endif %}
 
+# Available queries for non-admin user
+query_volume_filters_opt = name,status,metadata,availability_zone,bootable
 
 volume_name_template = volume-%s