Use AEM Healthcheck URL to verify if Publish is healthy

[mbloch1986]

When we introduced the new EC2 Tag COMPONENT_INIT_STATUS to identify if the provisioning of the EC2 instance finished successful. We've replaced the existing Publisher healthcheck logic in the orchestrator to use this EC2 tag for verification.

Ideally we should use both to identify if the Publisher is healthy or not.

• Verify if Provisoining was successful
• Verify that the AEM is healthy via the AEM Healthcheck URL

The Commit where we replaced the healthcheck logic:
a5eee90

[mbloch1986]

On top of verify if the provisioning was successful & the healthcheck returns the response code 200 we should also verify if the replication agent queue on the AEM Author instances are empty via the AEM Healthcheck URL. This will allow us to determine if the replication queue contains items or not.