LMS-1966 Adding a top level data set handler to use from jython.

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

...ch/systemsx/cisd/etlserver/DataSetRegistrationHelper.java

...ystemsx/cisd/etlserver/DataSetRegistrationRollbacker.java

...java/ch/systemsx/cisd/etlserver/DataStoreStrategyKey.java

...e/java/ch/systemsx/cisd/etlserver/IDataStoreStrategy.java

...stemsx/cisd/etlserver/PropertiesBasedETLServerPlugin.java

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

...strator/AbstractOmniscientTopLevelDataSetRegistrator.java

...isd/etlserver/registrator/DataSetRegistrationDetails.java

...isd/etlserver/registrator/DataSetRegistrationService.java

...ystemsx/cisd/etlserver/registrator/MarkerFileUtility.java

...sx/cisd/etlserver/registrator/TopLevelDataSetChecker.java

...emsx/cisd/etlserver/DataSetRegistrationAlgorithmTest.java