Use travis to deploy to Elastic Beanstalk

[glenrobson]

Currently deployment is done through AWS CodePipeline but this doesn't take into account if the unit tests failed. It would be better if travis did the deployment.

Possible guides:

https://medium.com/@sommershurbaji/continuous-delivery-with-aws-elastic-beanstalk-and-travis-ci-2dd54754965f

I think it would also save money as there is a cost to running CodePipeline.

[glenrobson]

Travis no longer an option...