adds testng dependency
implements StartOp.parse
adds missing license
adds dependency to mockito
implements StartOp.execute
creates Operation and Result interfaces and makes StartOp/StartResult
implement them
implements PollOp.parse
creates OperationParser and removes *Op.parse methods
removes dependency to junit
implements PollOp.execute
fix PollOpTest and PollOp
implements OperationHandler
implements BeginPoll marshalling
refactors ResultMarshallerTest to use a dataProvider
implements CancelPoll marshalling
implements ClosePoll marshalling
implements StreamUpdatePoll marshalling
implements WorkedPoll marshalling