Adding mongodb hosts (#2178)

Signed-off-by: Rajesh Rajendran <rjshrjndrn@gmail.com>

private_repo/ansible/inventory/dev/Core/hosts

 # Alert manager nodes which should be clustered
 # This values should be one of any manager node, if you've multinode cluster
 [alert-manager:children]
-# By default this value can be swarm-manager-1 or 2 or n; but for a single 
+# By default this value can be swarm-manager-1 or 2 or n; but for a single
 # cluster it should be one value.
 # If you have multiple cluster you can list all ips below one by one
 swarm-manager-1
 
-[swarm-manager-1] 
+[swarm-manager-1]
 18.0.0.15 swarm_master=true
 
-# This host will make sure prometheus for all stateful services 
+# This host will make sure prometheus for all stateful services
 # will run on a single node, as it has storage dependancy
 # By default this host is same as docker swarm prometheus
 [swarm-agent-for-prometheus-stateful:children]
@@ -36,6 +36,15 @@ keycloak-1
 [log-es:children]
 log-es-2
 
+[mongo_master]
+11.2.3.75 mongodb_master=True
+
+[mongo_replicas] #add ip in case replicaSet
+
+[mongo:children]
+mongo_master
+mongo_replicas
+
 [swarm-agent-for-prometheus-1]
 18.0.0.15
 
@@ -116,10 +125,10 @@ processing-cluster-zookeepers
 18.0.0.51              # Redis master IP of Knowledge platform
 
 [lp-redis-ps:children]
-lp-redis             
+lp-redis
 
 [redis-ps:children]
-lp-redis-ps           
+lp-redis-ps
 
 [redis-exporter-targets:children]
 lp-redis