Set Environment label in alerta to cluster_name

Change-Id: If7ea4e8bf99eeb37bcfb3fb7a3511bf75a885a3b
Related-PROD: PROD-21806
diff --git a/docker/swarm/stack/monitoring/alerta.yml b/docker/swarm/stack/monitoring/alerta.yml
index 858eb38..5e99286 100644
--- a/docker/swarm/stack/monitoring/alerta.yml
+++ b/docker/swarm/stack/monitoring/alerta.yml
@@ -29,3 +29,4 @@
                 ADMIN_USERS: ${_param:alerta_admin_username}
                 ADMIN_PASSWORD: ${_param:alerta_admin_password}
                 MONGO_URI: ${_param:alerta_mongodb_uri}
+                PLUGINS: ""
diff --git a/prometheus/server/alert/alerta_relabel.yml b/prometheus/server/alert/alerta_relabel.yml
index ca0f4b4..df6aca0 100644
--- a/prometheus/server/alert/alerta_relabel.yml
+++ b/prometheus/server/alert/alerta_relabel.yml
@@ -1,6 +1,6 @@
 parameters:
   _param:
-    alerta_environment_label: Development
+    alerta_environment_label: ${_param:cluster_name}
   prometheus:
     server:
       config:
@@ -22,4 +22,4 @@
             regex: "(.+;.+)"
           - source_labels: ["hostname", "job"]
             target_label: "instance"
-            regex: "(.+;.+)"
\ No newline at end of file
+            regex: "(.+;.+)"