merge updates in appconfig.

Merge branch 'statelessness/0.0.3'

fix typo

event-log deployment to Kubernetes.

Bump eventlog module to spring boot 2.0. Base version for the chapter…

…. No event log yet.

Add fallback behavior to circuit breaker.

Basic circuit breaker fronting Posts service.

Small deployment to demonstrate backoff in the Kubernetes replication…

… controller.

Add fallback behavior for Posts service timeout problems

Update class name to make clear it is a client of the Posts service.