Merge branch 'stable-2.14'

* stable-2.14:
  GerritMonitoringFilter: Format with google-java-format
  Format BUILD file with buildifier
  Add parameters to plugin configuration
  Default to using plugin data dir for new installations
  Finalize constants in JavamelodyFilter
  Format all java files with google-java-formatter
  Group Javamelody HTTP request statistics

Change-Id: I2c3bc53601803abf8e9161a0f397daf70f4aba33