[20180815173013] Resource Options, ECS AMI Updates, and Bug Fixes

[ddollar]

Allows generation 2 apps to specify options for their resources in the manifest:

See the docs for a list of available options.

resources:
  database:
    type: postgres
    options:
      class: ${DATABASE_CLASS}
      durable: true
      iops: 1000
      storage: 200
      version: 9.6.6

• #2847 allow app-based resources to specify options [@ddollar]
• #2851 update ecs amis [@ddollar]
• #2852 add cli compatibility with older racks [@ddollar]