Fix rabbitmq logs severities

There are info, notice, warning, error, critical
levels supported only.

Change-Id: I5248d70ee95dfd9b4929f94552a2898def73894c
Related-PROD: PROD-31241
(cherry picked from commit aac52139e8d5c9bfdb57a52398b8492c102fec58)
diff --git a/rabbitmq/meta/prometheus.yml b/rabbitmq/meta/prometheus.yml
index 88cce19..3dcfcf6 100644
--- a/rabbitmq/meta/prometheus.yml
+++ b/rabbitmq/meta/prometheus.yml
@@ -94,7 +94,7 @@
         description: "The RabbitMQ service on the {{ $labels.host }} node has received {{ $value }} messages."
     RabbitmqErrorLogsTooHigh:
       if: >-
-        sum(rate(log_messages{service="rabbitmq",level=~"(?i:(error|emergency|fatal))"}[5m])) without (level) > 0.05
+        sum(rate(log_messages{service="rabbitmq",level=~"(?i:(error|critical))"}[5m])) without (level) > 0.05
       labels:
         severity: critical
         service: rabbitmq
@@ -103,7 +103,7 @@
         description: "The rate of errors in RabbitMQ logs is too high on the {{ $labels.host }} node (as measured over the last 5 minutes)."
     RabbitmqErrorLogsMajor:
       if: >-
-        sum(increase(log_messages{service="rabbitmq",level=~"(?i:(error|emergency|fatal))"}[30m])) without (level) > 0
+        sum(increase(log_messages{service="rabbitmq",level=~"(?i:(error|critical))"}[30m])) without (level) > 0
       labels:
         severity: major
         service: rabbitmq