JBIDE-13410 bump parent pom version to 4.0.1.Final
JBIDE-13408: Use released version of Maven plugins
JBIDE-13601 : fix errai deployment issues

This fix is 3-fold :
- tells GPE to generate the errai classes in a WTP friendly folder
- removes non-existing sources from build classpath as it provokes NPEs
  and prevents Dev Mode from running
- Refresh Dev Mode generated folders so these resources can be publishes
  automatically on any WTP server the app is deployed to.

 The Dev workflow is greatly simplified for the user :

 * Dev Mode :
   - deploy app on WTP server
   - run as > Web Application on external server (fill in url and select
     entry point)
   - click on dev mode link to open in browser

 * Slow mode :
   - click on Google > GWT Compile
   - wait
   - Run as > Run on server
   - open browser

Signed-off-by: Fred Bricon <fbricon@gmail.com>
JBIDE-13602 : instanciate a Stacks in all circumstances

Signed-off-by: Fred Bricon <fbricon@gmail.com>
Conflicts:

	maven/plugins/org.jboss.tools.maven.project.examples/src/org/jboss/tools/maven/project/examples/wizard/NewProjectExamplesStacksRequirementsPage.java
all-tests/pom.xml should simply refer to central root pom so don't have to bump it every time we branch a new parent pom
JBIDE-13326 JBIDE-13335 remove performance fix from Central as users can now get it by updating to Juno SR2 instead