ECL-134 All DataSetServiceClient methods and documentation.
ECL-134 Changed names of the tapes in DataSetClient.
Commented on ParamConstants usage.
ECL-134 Refactorisation of DataSetServiceClient.
ECL-134 DataSetsClient: fixed test tapes.
ECL-134 Fixed tapes for changed method names etc.
ECL-134 Using ParamConstants in DataSetServiceClient extensively.