Enable kong consumer level metrics (#3467)

* kong consumer level metrics changes
* updated consumer level dashboard

ansible/roles/kong-api/defaults/main.yml

@@ -14,6 +14,34 @@ statsd_pulgin:
   name: statsd
   config.host: "{{ statsd_host }}"
   config.port: "{{ statsd_port }}"
+  config.metrics:
+  - name: request_count
+    sample_rate: 1
+    stat_type: counter
+  - name: latency
+    stat_type: timer
+  - name: request_size
+    stat_type: timer
+  - name: status_count
+    sample_rate: 1
+    stat_type: counter
+  - name: response_size
+    stat_type: timer
+  - consumer_identifier: username
+    name: unique_users
+    stat_type: set
+  - consumer_identifier: username
+    name: request_per_user
+    sample_rate: 1
+    stat_type: counter
+  - name: upstream_latency
+    stat_type: timer
+  - name: kong_latency
+    stat_type: timer
+  - consumer_identifier: username
+    name: status_count_per_user
+    sample_rate: 1
+    stat_type: counter
 
 # Default Rate limits
 small_rate_limit_per_hour: 100