Update Amazon ECS Roadmap (spinnaker#261)

roadmap.md

@@ -97,9 +97,7 @@ _This process could be made easier by investing in more strongly typed APIs and
 - **Beneficiary**: Amazon ECS users
 - **Area of Investment**: Cloud Providers
 - **Deliverables**:
-  - Contribute end to end testing resources (per [RFC](https://github.com/spinnaker/governance/blob/master/rfc/ecs_e2e_tests.md))
-  - Application search improvements 
-  - Pipeline expressions (SpEL) support for task definition artifacts 
+  - (Partially complete) Contribute end to end testing resources (per [RFC](https://github.com/spinnaker/governance/blob/master/rfc/ecs_e2e_tests.md))
 
 ### Spinnaker-as-Code