add resource change listener for when "bundles" folder inside liferay workspace is deleted and delete the associated server

• Type: Task
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.0 M2
• Fix Version/s: 3.0 M3
• Component/s: Liferay Workspace Support
• Labels: None

for QA:
1 create a liferay workspace by command line typing "blade init" in some empty folder and create a dir in the folder named "bundles" or the same as liferay.workspace.home.dir key in gradle.properties (default value is "bundles") and copy a portal bundle's content into the created dir.
such as :
ws
-bundles
-data
-deploy
-tomcat-xx
2 start a liferay-ide and use import liferay worksapce wizard to import the ws into eclipse and you will find a server and a runtime added into eclipse.
3 delete the ''bundles" dir or delete the whole project (no matter delete the content or not) and the server and runtime will also be deleted.