* Support grpc exporter.

* Support scope(all) metric export and finish document.

* Close exporter even in local debug env. And fix CI.

* Remove the system.out

* Fix absent 4.

* Support subscription from remote.

* Add the doc

* Update application.yml

Add catalog to ScopeDeclaration annotation. Make the alarm adapt to it. Now more metric could go through alarm, such as JVM, CLR. (#2391)

* Fix the alarm being started too many times.

* Remove unnecessary interface.

* Fix wrong status changed

* Fixed the startup failure cause by query protocol.

* Fixed the bug of startup failure.

* Cluster module implementation finished.

Module class rename to ModuleDefine, Module is the JDK9 class. It is conflict with our Module class. (#1168)

* Refactor the collector configuration initialization.

#1047

Provide new stage of module initialization. Named `notifyAfterCompleted`. And rename `init` stage to `start`. Now the initialization sequence is prepare -> start -> notifyAfterCompleted