Add metrics quota kafka for client-id or/and user (#433)

Signed-off-by: Álvaro Bacelar <alvarobacelar@outlook.com>

example_configs/kafka-2_0_0.yml

@@ -35,6 +35,21 @@ rules:
   name: kafka_$1_$2_$3_total
   type: COUNTER
 
+- pattern: kafka.server<type=(.+), client-id=(.+)><>([a-z-]+)
+  name: kafka_server_quota_$3
+  type: GAUGE
+  labels:
+    resource: "$1"
+    clientId: "$2"
+
+- pattern: kafka.server<type=(.+), user=(.+), client-id=(.+)><>([a-z-]+)
+  name: kafka_server_quota_$4
+  type: GAUGE
+  labels:
+    resource: "$1"
+    user: "$2"
+    clientId: "$3"
+
 # Generic gauges with 0-2 key/value pairs
 - pattern: kafka.(\w+)<type=(.+), name=(.+), (.+)=(.+), (.+)=(.+)><>Value
   name: kafka_$1_$2_$3