Drools: fixed NestedEditor

Some new methods were added into Editor interface.
At the moment these methods throw an UnsupportedOperationException
which doesn't matter since the Drools tests don't use them.
SwitchYard: removed temporary update site for switchyard 2.0
SwitchYard: jetty version changed to 8.1.14

Jetty 8.1.14 is included in Eclipse Luna