JBIDE-17175 org.jboss.tools.jst.web.kb.test and org.jboss.tools.jst.web.ui.test tests failure on Windows

Fixed junit.framework.AssertionFailedError: Required CSS Rule is not selected
Create an adapter for Tern.java

The project and feature with definitions required to adapt JSDT project to Tern.java are created

Signed-off-by: vrubezhny <vrubezhny@exadel.com>
[JBIDE-17161] Include torn.java jsdt adapter into jst