Micronaut Consul Watcher

Update Micronaut Context and publish a RefreshEvent when a change is detected in a KV used for configurations.
Current format supported are

• NATIVE
• JSON
• PROPERTIES
• YAML

The watcher can be configured using

consul:
  watch:
    disabled: false # to disable the watcher, during test for instance
    block-timeout: 10m # Sets the read timeout. Default value (10 minutes).