Merge changes from topic "pull-replication-healthcheck"

* changes:
  Always report healthy when instance has caught up with outstanding tasks
  Assess healthiness by factoring in periodOfTime
  Implement outstanding-tasks healthcheck
  Read heathcheck settings from plugin configuration
tree: d852e970ecfacb134dc1acf1dbd6739c10015d32
  1. example-setup/
  2. src/
  3. .gitignore
  4. BUILD
  5. Jenkinsfile
  6. LICENSE