LMS-1909 Fill out DataSetInformation better. More robust error reporting.

...msx/cisd/etlserver/AlwaysIdentifiedDataStrategyStore.java

...systemsx/cisd/etlserver/DataSetRegistrationAlgorithm.java

...ch/systemsx/cisd/etlserver/IExtensibleDataSetHandler.java

...ch/systemsx/cisd/etlserver/TransferredDataSetHandler.java

...ityregistration/SampleAndDataSetControlFileProcessor.java

...r/entityregistration/SampleAndDataSetFolderProcessor.java

...tityregistration/SampleAndDataSetRegistrationHandler.java

...erver/entityregistration/SampleAndDataSetRegistrator.java

.../cisd/etlserver/entityregistration/SampleDataSetPair.java