Add a DNS record name to the Elastic Loadbalancer using AWS route53 to access the management consoles

**Description:**
While creating a Loadbalancer, the DNS name includes the name of the AWS region in which the load balancer is created. The DNS name created for WSO2 APIM Loadbalancer is similar to something "AWSCloudF-WSO2APIM-*************.us.east-1.elb.amazonaws.com". Since it is lengthy and complicated, a simple hostname should be set to the loadbalancer using AWS Route53.

