auto terminate failed instances

[mbloch1986]

For components which are controlled by an ASG(Author-Dispatcher, Publish-Dispatcher, Publish Chaos-Monkey & Orchestrator) we are checking if the provisioning was successful or not and are updating the ec2 tag ComponentInitStatus accordingly.

Our readiness check, in inspec-aem-aws, used to rely on the ec2 instance IDs for determining the stack healthiness. This is not the case anymore which means if one of these components author-dispatcher, publish-dispatcher or publish cycles during stack creation the readiness check will wait until the ASG/ELB resource is healthy.

These recently added new enhancements allows us to think about of new features like an auto termination feature for these instances if the provisioning failed. In some cases an instance may fail provisioning but the ELB still sees these instances as healthy, since the ELB is just checking a web endpoint in AEM.