[20180125145751] Custom IAM Policies, ECS Health Check Grace Period, and Bug Fixes

[ddollar]

• #2429 support ecs health check grace period [@ddollar]
• #2452 add IamPolicy app parameter for custom iam policy on service role [@ddollar]
• #2459 skip --options to add/copy for sync [@ddollar]
• #2461 update ci cleanup script [@ddollar]