* [maven-release-plugin] prepare release v6.3.0

* [maven-release-plugin] prepare for next development iteration

* [maven-release-plugin] prepare release v6.2.0

* [maven-release-plugin] prepare for next development iteration

* New stream annotation.
- Inventory annotation example:
@Stream(name = ServiceInventory.INDEX_NAME, scopeId = DefaultScopeDefine.SERVICE_INVENTORY, storage = @storage(builder = ServiceInventory.Builder.class, deleteHistory = false), kind = StreamKind.Inventory)

- Metrics annotation example:
@Stream(name = ServiceRelationClientSideMetrics.INDEX_NAME, scopeId = DefaultScopeDefine.SERVICE_RELATION, storage = @storage(builder = ServiceRelationClientSideMetrics.Builder.class), kind = StreamKind.Metrics)

- Record annotation example:
@Stream(name = SegmentRecord.INDEX_NAME, scopeId = DefaultScopeDefine.SEGMENT, storage = @storage(builder = SegmentRecord.Builder.class), kind = StreamKind.Record)

- TopN annotation example:
@Stream(name = TopNDatabaseStatement.INDEX_NAME, scopeId = DefaultScopeDefine.DATABASE_SLOW_STATEMENT, storage = @storage(builder = TopNDatabaseStatement.Builder.class), kind = StreamKind.TopN)

* no message

* Stream annotation finish.

* Make stream processors to be the singleton class.

* Fixed the compile errors.

* Modify the OAL module for this annotation refactor.

* Add apache license header.

* Duplicate import.

* Fixed check style error.

* Move submodule plugin.

* Always auto-submodule

* [maven-release-plugin] prepare release v6.1.0

* [maven-release-plugin] prepare for next development iteration

* Change keys location.

* Make Jaeger receiver works in 12450 as default.

* Finish compile and codebase.

* Make codes runnable.

* Finish Jaeger query tests.

* Add document for jaeger receiver.

* Add readme.

* Fix a break link.

* Finish doc.

* Codebase for zipkin span persistence.

* Fix missing fields in storage.

* Miss the latency field.

* Finish some tests.

* Fix wrong latency.

* Finish doc and reset application.yml

* Make the description more clear.