Update feature to pull nattable core when used by anoter project

Author: opcoach

com.opcoach.e4tester.feature/feature.xml

@@ -17,11 +17,12 @@
       [Enter License Description here.]
    </license>
 
+   <includes
+         id="org.eclipse.nebula.widgets.nattable.core.feature"
+         version="0.0.0"/>
+
    <plugin
          id="com.opcoach.e4tester.core"
-         download-size="0"
-         install-size="0"
-         version="0.0.0"
-         unpack="false"/>
+         version="0.0.0"/>
 
 </feature>