JBIDE-15792 - JPP 6.1 project does not contain JBoss Portlet Libraries

https://issues.jboss.org/browse/JBIDE-15792
JPP 6.1 project does not contain JBoss Portlet Libraries

The issue is caused by the change of the structure in JPP 6.1
Updating component version to 1.6.0-SNAPSHOT