[Docs] Java: Added setter for DiscoveryScope in DiscoveryQos
[Docs] Java: Added setter for DiscoveryScope in DiscoveryQos

Change-Id: I34ac43634b9b9d4d5d05e8da3c176becff3a21af

bmwcarit/joynr,bmwcarit/joynr,clive-jevons/joynr,bmwcarit/joynr,clive-jevons/joynr,bmwcarit/joynr,clive-jevons/joynr,bmwcarit/joynr,clive-jevons/joynr,clive-jevons/joynr,bmwcarit/joynr,bmwcarit/joynr,clive-jevons/joynr,bmwcarit/joynr,bmwcarit/joynr