[JS] Add npm run clean to maven clean phase
[JS] Add npm run clean to maven clean phase

to fix failing build because of old resources

Change-Id: Ic4cf39c32e521e4b1cfef97e9704044b03892998

bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr