Use percent metrics for majority-down

Change-Id: Iecf71606de225ae6054ff63eb41e94e318dc9933
diff --git a/cinder/meta/heka.yml b/cinder/meta/heka.yml
index 9a7e0a0..354fdb0 100644
--- a/cinder/meta/heka.yml
+++ b/cinder/meta/heka.yml
@@ -103,7 +103,7 @@
       description: 'Majority of Cinder schedulers are down'
       severity: critical
       rules:
-      - metric: openstack_cinder_services
+      - metric: openstack_cinder_services_percent
         field:
           service: scheduler
           state: up
@@ -144,7 +144,7 @@
       description: 'Majority of Cinder volumes are down'
       severity: critical
       rules:
-      - metric: openstack_cinder_services
+      - metric: openstack_cinder_services_percent
         field:
           service: volume
           state: up