Adding ecs service ignore (#10)

* adding lifecycle event to ignore task def, desired count, and load balancer changes

* Revert "adding lifecycle event to ignore task def, desired count, and load balancer changes"

This reverts commit 683eccc.

* asking terraform to ignore changes to load balancer when blue/green deploys happen

main.tf

@@ -454,7 +454,7 @@ resource "aws_ecs_service" "ignore_changes_task_definition" {
   triggers = local.redeployment_trigger
 
   lifecycle {
-    ignore_changes = [task_definition]
+    ignore_changes = [task_definition, load_balancer]
   }
 
   # Avoid race condition on destroy.