[20161012224448] Bug Fixes and Enhancements

[ddollar]

• #1307 proper version for deprecation [@ddollar]
• #1308 parameterize postgres version [@ddollar]
• #1309 login properly to ECR registries [@ddollar]
• #1280 wait for services to converge before continuing instance termination [@ddollar]
• #1303 registry login fixes [@ddollar]