Fix IPMC checks for releasing.

* Finish the prototype of TLS of gRPC between agent and server.

* Fix for rat check.

* Update GRPCChannelManager.java

* Update AgentModuleGRPCProvider.java

* Upgrade netty version (#971)

* Make sure end user can't start gRPC server with and without SSL in the same port.

* Proposal the code structure for table name prefix. Related to #932

* Fix style check.

* Keep ESDao table name in control.

* Finish all codes about ES namespace feature.

* fix #939

fix #939

* fixcheckstyle

* Update docs for alpha release

* Delete a comma.

* Update How-to-build.md

* Add data-set licenses file

* Rename LICENSES-data-set to LICENSE-data-set

* Update LICENSE

* Remove fastclick from LICENSE

* Make the git submodule command to be a maven profile plugin. Let this command not execute by default install command.

* [maven-release-plugin] prepare release apm-5.0.0-alpha

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

* Product name is not correct

* Add more documents for release.

* Change profile id.

* Add CHANGES file in distribution file.

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

This reverts commit ac815019.

* Revert "[maven-release-plugin] prepare release apm-5.0.0-alpha"

This reverts commit 095597c9.

* Add rat plugin to check dependency license and add license head into missing files.

* Fix docs.

* Exclude web ui config file.

* Next release guide.

* UI update.

* Update docs.

* Build source shell.

* Support zk namespace, #935

* Revert default changes.

* [maven-release-plugin] prepare release apm-5.0.0-alpha

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

The time range expression for query the live instance between the start time and end time is incorrect.

* Fixed #920

* Sync sub module.

* Fixed #918

* 1. Fixed the remote serialize exception bug when there was a null value in string array.
2. Fixed the topology null exception bug when source or target application id is 0.

* Fixed the no data avg throughput in service bug.

* Fixed no parent dependency for service dependency graph #906

1. Fixed the OverViewLayerQuery#getTopNSlowService method bug which is not order by average response time. (#913)

2. Fixed the OverViewLayerQuery#getTopNApplicationThroughput method bug which is not order by TPS.
3. Fixed the ApplicationQuery#getSlowService method bug which is not order by average response time.
4. Fixed the ApplicationQuery#getServerThroughput method bug which is not order by TPS.

#907

* 1. Add transaction average duration, business transaction average duration, MQ transaction average duration into all metric entities, DAO define, persistence DAO.
2. Add formula calculate operation.

* Refactor the package name in storage module, make the table define and dao package’s name same as others.

* Get the MQ server address id from reference.

* Fixed the remote exception bug when running cluster mode collector.
How: Register remote data entity into remote module.

* Fixed the bug which the end second time bucket calculate result is incorrect.

* Fixed a test case error.

* Get the MQ server address id from reference.

* Fixed the remote exception bug when running cluster mode collector.
How: Register remote data entity into remote module.

1. Use peer id in entry span to find the instance id and application id.
2. Make the instance id and application id to be the front instance id and front application id of the reference metric.
3. Do not create the application mapping metric.

Fixed the getApplicationTopology bug, remove the application node which not contains the source or target of calls.

Fixed the number of application bug.

2. Setting the src span type when agent register service name.
3. Revert the topology build logic.

2. Search server by application code by searchServer method.

2. loadAlarmList ok.