* Lock oracle and resin plugins version.
* Move resin and oracle plugin to openskywalking
* Restore submodule active.
* Add another submodule active command.
* Remove the wrong test cases in release and fix some doc issues.
* [maven-release-plugin] prepare release v6.0.0-alpha
* [maven-release-plugin] prepare for next development iteration
* Fix some doc
* Add login filter
Username and password are stored in application.yml with
prefix "security.user"
* Modify startup script and add webapp.yml config file
* Update quick-start document for default login username/password
* Update deploy document for new webapp.yml config file
* Update license for new files.