* 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.

* Rename metric to metrics.

* Fixed test case execute failure issues.

* Rename ALarmSupported to WithMetadata

* Finish the base of exporter.

* Fix class comment.

* Make scope meta configurable.

* Fix test cases in ci.

* Change step 1

* Refactor step 2

* Other compile issue done. Prepare the generator changes.

* Revert some wrong changes to Istio receiver.

* Step 3, make compile pass.

* Try to make CI passed.

* Add a check.

* Fix generated code style

* Provide new and extendable dispatcher generator tool

* Fix startup.

* Can't guarantee the dispatchers are always existing. Put explicit comments at there to avoid confusion, since this is different with old version.

* Fix a H2 query for endpoint search.

* Fix a wrong mysql alarm query.

* Provide new document and `generate-tool-grammer` module.

* Add missing last section of document.

* Fix typo

* Relocate the @ScopeDeclaration annotation, make it more sense. Also remove the useless @SourceType annotation. And adjust document for these changes

* ScopeDeclaration can be used once for each class only, now.

* Move oal tool back into main repo, and fix compile issue.

* Fix two bugs.

* Remove all generated codes.

* Make all oal generated codes out of source control.

* Make mvn compile and package work.

* Fix test cases.

* Make compile right and provide new documents.

* Remove an unnecessary tokens file.

* Add source attr into StorageEntity, and remove the this attr from InventoryType.

* Make RegisterLockInstaller works based on InventoryProcess registered info.

* 1. Fixed the bug of the cluster node sync failure cause by curator instance cache is null.
2. Fixed the bug of the collection in remote data builder is not initialized.

* 1. Re-generate indicator.

* Fixed the bug of the collection in remote data builder is not initialized.

* Fixed the bug of the remote client created but not  initialize.

* Support metrics downsampling.

* Fixed a check style error.

* New generated indicators for real backend system.

* Support cpm and new indicators.

* Fix CI and change document.

* Remove an useless line.

* Support new indicator core.

* Block 2 unaccessible methods.

* Add service call as manual indicator and refactor the core DIspatcherManager

* Add transfer time bucket methods.

* prepare to merge

* Support time bucket transfer.

* Add generate indicator and dispatcher about service topology but not test.

* Delete call type from service relation.

* Refactor register and analysis modules.

* Fixed the startup error.

* Use annotation to instead of definition file.

* Storage and Persistence.

* Storage config.

* Fixed the CI failure.

* Sample operator code.

* Indicator aggregator framework.

* Provide some annotation for OAL.

* Remote module.

* Register service.

* Add apache license header.

* Ignore comments when load definition files.

* Sample operator code.

* Indicator aggregator framework.

* Provide some annotation for OAL.

* Receiver, aggregate, server finished.