Update ec2.ini

- Set rds and elasticache to False, since they are not needed for the
  playbooks and cause issues for users without those services enabled.

inventory/aws/hosts/ec2.ini

@@ -45,10 +45,10 @@ vpc_destination_variable = ip_address
 route53 = False
 
 # To exclude RDS instances from the inventory, uncomment and set to False.
-#rds = False
+rds = False
 
 # To exclude ElastiCache instances from the inventory, uncomment and set to False.
-#elasticache = False
+elasticache = False
 
 # Additionally, you can specify the list of zones to exclude looking up in
 # 'route53_excluded_zones' as a comma-separated list.