Merge branch 'stable-2.14'

* stable-2.14:
  Use Strings.isNullOrEmpty instead of just null check
  Code cleanup: use Objects.equals instead of own eq method
  Clarify and fix sharedDirectory configuration
  Upgrade Bazlets and use released 2.14.1 API
  Add configuration to disable synchronization
  Fix log message
  Move ForwardedAwareEventBroker to forwarder package

Change-Id: If6216d3a2f367433b0cd1929a0f8193895e636d5