Openstack API check improvements

- switch from "name" to "service_name" label;
- bump telegraf image.

Change-Id: Id180731eabd4c32de2489a96295465a95d15304c
Related-PROD: PROD-35549
diff --git a/prometheus/gainsight/query/openstack.yml b/prometheus/gainsight/query/openstack.yml
index 1eac4c3..daed58e 100644
--- a/prometheus/gainsight/query/openstack.yml
+++ b/prometheus/gainsight/query/openstack.yml
@@ -11,15 +11,14 @@
         instances: "'Instances','avg(sum(avg_over_time(openstack_nova_instances{state=\"active\"}[24h])) by (instance))'"
         compute_nodes: "'Compute Nodes','avg(sum(openstack_nova_services{binary=~\"nova.compute\"}) by (instance))'"
         tenants: "'Tenants','avg(sum(avg_over_time(openstack_keystone_tenants_total[24h])) by (instance))'"
-        cinder_api: "'Cinder API','avg_over_time(name:openstack_api_check_status:avg5m:for5m:ceil:avg5m:floor{name=\"cinderv2\"}[24h]) * 100'"
-        nova_api: "'Nova API','avg_over_time(name:openstack_api_check_status:avg5m:for5m:ceil:avg5m:floor{name=\"nova\"}[24h]) * 100'"
-        keystone_api: "'Keystone API','avg_over_time(name:openstack_api_check_status:avg5m:for5m:ceil:avg5m:floor{name=\"keystone\"}[24h]) * 100'"
-        glance_api: "'Glance API','avg_over_time(name:openstack_api_check_status:avg5m:for5m:ceil:avg5m:floor{name=\"glance\"}[24h]) * 100'"
-        neutron_api: "'Neutron API','avg_over_time(name:openstack_api_check_status:avg5m:for5m:ceil:avg5m:floor{name=\"neutron\"}[24h]) * 100'"
+        cinder_api: "'Cinder API','avg_over_time(service_name:openstack_api_check_status:avg5m:for5m:ceil:avg5m:floor{service_name=\"cinderv2\"}[24h]) * 100'"
+        nova_api: "'Nova API','avg_over_time(service_name:openstack_api_check_status:avg5m:for5m:ceil:avg5m:floor{service_name=\"nova\"}[24h]) * 100'"
+        keystone_api: "'Keystone API','avg_over_time(service_name:openstack_api_check_status:avg5m:for5m:ceil:avg5m:floor{service_name=\"keystone\"}[24h]) * 100'"
+        glance_api: "'Glance API','avg_over_time(service_name:openstack_api_check_status:avg5m:for5m:ceil:avg5m:floor{service_name=\"glance\"}[24h]) * 100'"
+        neutron_api: "'Neutron API','avg_over_time(service_name:openstack_api_check_status:avg5m:for5m:ceil:avg5m:floor{service_name=\"neutron\"}[24h]) * 100'"
         nova_vm_all: "'Total VM number','avg_over_time(total:openstack_nova_instance_all[1d])'"
         nova_vm_failed: "'Failed VM number','avg_over_time(total:openstack_nova_instance_failed[1d])'"
         kpi_downtime: "'KPI Downtime','1 - avg_over_time(total:openstack_nova_instance_failed[1d]) / avg_over_time(total:openstack_nova_instance_all[1d])'"
         compute_instance_create_start: "'VM creation start','sum(compute_instance_create_start_event_doc_count)'"
         compute_instance_create_end: "'VM creation end','sum(compute_instance_create_end_event_doc_count)'"
         compute_instance_create_error: "'VM creation error','sum(compute_instance_create_error_event_doc_count)'"
-