* Make k8s-Coordinator back in role mode.
* Start query API server after the core started.
* Do lock when port has been intialized.
* Rename service.
* Fix text cases.
* Declare ConfigService.class in core module.
* Implement in an easier way.
* Envoy print whole metric, now in debug.
* Forcedly fix envoy timestamp issue.
* Lock oracle and resin plugins version.
* Move resin and oracle plugin to openskywalking
* Restore submodule active.
* Add another submodule active command.
* Remove the wrong test cases in release and fix some doc issues.
* [maven-release-plugin] prepare release v6.0.0-alpha
* [maven-release-plugin] prepare for next development iteration
* Fix some doc