Correct InfluxDB alerts

Change-Id: I62d170917f802578e6bac56fdc05f5e81ec32e3a
diff --git a/influxdb/meta/prometheus.yml b/influxdb/meta/prometheus.yml
index d341eb4..6ff2229 100644
--- a/influxdb/meta/prometheus.yml
+++ b/influxdb/meta/prometheus.yml
@@ -56,7 +56,7 @@
         severity: warning
         service: influxdb
       annotations:
-        summary: "Reached{%- endraw %} {{ influx_max_series_threshold }}%{%- raw %} of time series in the InfluxDB {{ $labels.database }} database"
+        summary: "Reached{%- endraw %} {{ monitoring.max_series_percentage }}%{%- raw %} of time series in the InfluxDB {{ $labels.database }} database"
         description: "The InfluxDB {{ $labels.database }} database contains {{ $value }} time series."
     InfluxdbSeriesMaxNumberCritical:
       {%- endraw %}