* 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.

org.skywalking.apm.collector.core.module.CycleDependencyException: Exist cycle module dependencies in
Test[provider=org.skywalking.apm.collector.core.module.TestModuleProvider]
BaseA[provider=org.skywalking.apm.collector.core.module.ModuleAProvider]

Support to find node by id and output type. Node<?, Integer> foundNode = GraphManager.INSTANCE.findGraph(6).toBuilder().findNode(2, Integer.class);

```
17:45:48.486 [pool-2-thread-1] ERROR org.skywalking.apm.collector.core.module.instrument.MetricCollector -
##################################################################################################################
#                                             Collector Service Report                                                                                                                                            #
##################################################################################################################
BaseB:
 P-B:
BaseA:
 P-A:
  public void org.skywalking.apm.collector.core.module.ModuleABusiness1Impl.print():
   Avg=1585 (nano), Success Rate=100%
```

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